On which one among the follow- ing islands does the Negrito tribe called 'the Onge' live ?

1. Physiography of Andaman and Nicobar Islands (basic)

Welcome to your first step in mastering India’s geography! To understand the cultural fabric of a region, we must first look at the land itself. The Andaman and Nicobar Islands are a sprawling archipelago of over 500 islands in the Bay of Bengal Exploring Society: India and Beyond, Class VII, p.21. These aren't just random patches of land; they are actually the elevated portions of a submerged mountain range that extends from Myanmar (the Arakan Yoma). The chain is broadly divided into two clusters: the Andaman Islands to the north and the Nicobar Islands to the south, separated by a deep water body known as the Ten Degree Channel Geography of India, Majid Husain, p.66.

Physiographically, these islands are rugged and mountainous. In the north, Saddle Peak (738 m) stands as the highest point, while the south is home to Mount Thuiller in Great Nicobar India Physical Environment, Class XI, p.15. Interestingly, while most of the islands are tectonic in origin, some are volcanic. Barren Island, located in the Nicobar group, is particularly famous as India's only active volcano. Because they are situated close to the equator, these islands experience convectional rainfall and are draped in lush, equatorial vegetation, creating a unique environment for the indigenous tribes that have lived here for millennia.

From a cultural perspective, the physical isolation of specific islands has preserved ancient ways of life. For instance, the Onge, an indigenous Negrito tribe characterized by their short stature and dark skin, are the primary inhabitants of Little Andaman, specifically settled in areas like Dugong Creek. Their survival is deeply tied to the islands' dense forests and coastal resources. This rugged terrain and tropical climate have acted as both a shield and a sanctuary, making the physiography of the islands the true foundation of their unique cultural identity.

Sources: Exploring Society: India and Beyond, NCERT Class VII, Geographical Diversity of India, p.21; Geography of India, Majid Husain, Physiography, p.66; India Physical Environment, NCERT Class XI, Structure and Physiography, p.15

2. Racial Diversity: The Negrito Element in India (basic)

To understand the human tapestry of India, we must look at the Negritos, who are widely regarded by anthropologists as the earliest racial group to arrive in the Indian subcontinent. According to the seminal classification by Dr. B.S. Guha, the former Director of the Anthropological Survey of India, the Negritos represent the first of six major racial groups that shaped India's population Geography of India, Cultural Setting, p.10. Although they once inhabited much of the mainland, today their presence is largely restricted to isolated pockets, having been pushed to the peripheries by subsequent waves of migration.

The Negritos are physically distinct, possessing traits that indicate an evolutionary adaptation to tropical forest environments. Their physical profile generally includes:

Feature	Description
Stature	Short (typically around 150 cm)
Hair	Frizzy or "woolly" hair
Skin Tone	Dark brown to black
Facial Features	Bulbous forehead, flat nose, and slightly protruding jaws

In contemporary India, the Negrito element survives in two distinct geographical areas. On the mainland, traces of these traits are found among hill tribes in South India—such as the Irulas, Kadars, and Paniyans—and even among the Angami-Nagas in the Northeast Geography of India, Cultural Setting, p.10. However, the most "pure" or isolated representatives of this race live in the Andaman and Nicobar Islands. These islanders, including the Jarawa, Sentinelese, and Onge, are believed to have migrated from the Malay Peninsula thousands of years ago and share close cultural and physical affinities with the Semangs and Sakais of Malaysia Geography of India, Cultural Setting, p.10.

A particularly significant group within this racial branch is the Onge tribe. Historically, the Onge were the sole permanent inhabitants of Little Andaman. Today, they are a protected Scheduled Tribe, primarily concentrated in two settlements: Dugong Creek and South Bay. Over the last century, their population has seen a precarious decline due to external contact and diseases, making them a focal point for anthropological conservation efforts.

Sources: Geography of India, Cultural Setting, p.10; Geography of India, Cultural Setting, p.13

3. Particularly Vulnerable Tribal Groups (PVTGs) Framework (intermediate)

In India’s diverse social fabric, the Scheduled Tribes (STs) are not a uniform group. Recognizing that some tribes are significantly more marginalized and less developed than others, the Indian government established a specific sub-classification. This effort originated from the Dhebar Commission (1960–1961), which noted that within the Scheduled Tribes, there exists a 'lowest layer' that remains at a very primitive stage of development Indian Polity, M. Laxmikanth, Scheduled and Tribal Areas, p.416. Initially called 'Primitive Tribal Groups' (PTGs) in 1975, the category was renamed to Particularly Vulnerable Tribal Groups (PVTGs) in 2006 to adopt more sensitive terminology. To be classified as a PVTG, a tribal community must meet four specific criteria. These criteria are designed to identify groups that are at risk of disappearing or lack the tools to adapt to modern socio-economic changes:

• Pre-agricultural level of technology: Relying mostly on hunting, gathering, or shifting cultivation.
• Stagnant or declining population: Unlike the general population, these groups often see their numbers dwindle.
• Extremely low literacy: Often nearing zero percent in traditional settings.
• Subsistence-level economy: Living on the margins with very little surplus or trade.

Currently, there are 75 identified PVTGs across 18 states and the Union Territory of Andaman and Nicobar Islands. A poignant example is the Onge tribe of Little Andaman. Belonging to the Negrito racial group, they were once the sole inhabitants of the island but are now restricted to settlements like Dugong Creek due to external contact and disease Geography of India, Majid Husain, Cultural Setting, p.10. Their physical characteristics, such as short stature and dark skin, and their traditional lifestyle make them a textbook case of why the PVTG framework is vital for cultural preservation Geography of India, Majid Husain, Islands of the Bay of Bengal, p.68.

Sources: Indian Polity, M. Laxmikanth, Scheduled and Tribal Areas, p.416; Geography of India, Majid Husain, Cultural Setting, p.10; Geography of India, Majid Husain, Islands of the Bay of Bengal, p.68

4. Constitutional and Legal Safeguards for Tribes (intermediate)

In the vast tapestry of Indian democracy, the Scheduled Tribes (STs) are recognized not merely as a socio-economically backward group, but as distinct cultural entities whose way of life requires specific insulation from the mainstream to prevent exploitation. The Constitution does not provide a rigid definition of a "tribe"; instead, under Articles 341 and 342, the President is empowered to specify which communities are Scheduled Tribes in consultation with the Governor of a State. This list is dynamic and can only be amended by an Act of Parliament D. D. Basu, Introduction to the Constitution of India, p.457.

The safeguards for these communities are broadly categorized into political, administrative, and legal protections. To ensure they have a voice in the nation's governance, Article 332 mandates the reservation of seats in State Legislative Assemblies (proportional to their population), while Article 330 does the same for the Lok Sabha D. D. Basu, Introduction to the Constitution of India, p.462. Furthermore, to ensure focused executive attention, Article 164 requires specific states with significant tribal populations—such as Madhya Pradesh, Odisha, and Chhattisgarh—to have a dedicated Minister in charge of tribal welfare D. D. Basu, Introduction to the Constitution of India, p.459.

Perhaps the most unique feature of tribal protection is the special administrative framework provided under Article 244, which divides tribal areas into two categories:

Feature	Fifth Schedule	Sixth Schedule
Applicability	Scheduled Areas in most of India.	Tribal Areas in Assam, Meghalaya, Tripura, and Mizoram.
Governance	Administered through Tribal Advisory Councils.	Administered through Autonomous District Councils with legislative powers.

In addition to these constitutional pillars, specific legal notifications like the Island Protection Zone (IPZ) Notification are vital for oceanic tribes, such as the Onge or Jarawa of the Andaman and Nicobar Islands. These laws aim to protect the fragile biodiversity and the livelihood security of these fast-dwindling indigenous populations from external commercial encroachment Shankar IAS Academy, Environment, p.59 Majid Husain, Geography of India, p.68.

Sources: Introduction to the Constitution of India, D. D. Basu (26th ed.), Minorities, Scheduled Castes and Scheduled Tribes, p.457, 459, 462; Environment, Shankar IAS Academy (10th ed.), Aquatic Ecosystem, p.59; Geography of India, Majid Husain (9th ed.), Physiography, p.68

5. Marine Biodiversity and Coastal Ecology of the Archipelago (intermediate)

The Andaman and Nicobar Islands represent one of the most vibrant marine ecosystems in the world, often referred to as the 'rainforests of the ocean' due to their immense biological diversity. At the heart of this ecology are the coral reefs, which serve as the primary nurseries for marine life. India identifies four major reef regions for intensive conservation: the Gulf of Mannar, the Gulf of Kutch, Lakshadweep, and the Andaman and Nicobar Islands Geography of India, Majid Husain, Natural Vegetation and National Parks, p.53. To study and protect these fragile systems, the National Coral Reef Research Centre has been established at Port Blair Environment and Ecology, Majid Hussain, BIODIVERSITY, p.54.

Understanding the specific architecture of these reefs is crucial, as they vary significantly across the archipelago. Corals are classified based on their formation and distance from the shoreline:

Reef Type	Characteristics	Regional Occurrence
Fringing Reefs	Contiguous with the shore; the most common form.	Dominant in the Andaman Islands.
Barrier Reefs	Linear structures separated from the shore by a deep lagoon.	Found in the Nicobar Islands and Lakshadweep.
Atolls	Circular reefs surrounding a central lagoon, arising from subsiding sea floors.	Common in Lakshadweep.
Patch Reefs	Isolated, discontinuous patches.	Palk Bay and Gulf of Mannar.

Note: While Fringing reefs are the most common in the Andamans, the Nicobar chain features the more complex Barrier reef structures Environment, Shankar IAS Academy, Aquatic Ecosystem, p.51.

Beyond the corals, the coastal ecology is defined by its seagrass meadows and mangroves. These seagrasses are vital for the survival of the Dugong (or 'sea cow'), a gentle marine mammal currently on the verge of extinction. Out of 58 global seagrass species, 14 are found in Indian waters, primarily in these intertidal regions Environment, Shankar IAS Academy, Marine Organisms, p.209. The islands also serve as critical nesting grounds for giant marine turtles, including the Leatherback, Green, and Olive Ridley turtles, which rely on the pristine sandy beaches of the archipelago for their life cycles.

However, this ecology faces severe threats from marine pollution, sedimentation, and coral bleaching—a phenomenon driven by rising sea temperatures that causes corals to expel their symbiotic algae and turn white. These 'bleaching epidemics' can lead to mass mortality, destabilizing the entire food web Environment and Ecology, Majid Hussain, BIODIVERSITY, p.54.

Sources: Geography of India, Majid Husain, Natural Vegetation and National Parks, p.53; Environment and Ecology, Majid Hussain, BIODIVERSITY, p.54; Environment, Shankar IAS Academy, Aquatic Ecosystem, p.51; Environment, Shankar IAS Academy, Marine Organisms, p.209

6. Mapping Indigenous Tribes of Andaman and Nicobar (exam-level)

The Andaman and Nicobar archipelago, situated in the Bay of Bengal, is not just a geographic marvel of evergreen forests and coral reefs; it is home to some of the world's most ancient and isolated human populations. These islands were settled by indigenous groups tens of thousands of years ago, maintaining a lifestyle deeply connected to the unique island ecology Exploring Society: India and Beyond, NCERT Class VII, Geographical Diversity of India, p.21. To master the mapping of these tribes, we must distinguish between the two distinct racial groups inhabiting the islands: the Negritos of the Andamans and the Mongoloids of the Nicobars.

The Andamanese tribes (Great Andamanese, Jarawa, Onge, and Sentinelese) are characterized by their Negrito physical traits—short stature, dark skin, and frizzy hair. Among these, the Onge are historically the sole inhabitants of Little Andaman, specifically concentrated today around Dugong Creek and South Bay. While the Jarawa inhabit the western coasts of Middle and South Andaman, and the Sentinelese remain completely isolated on North Sentinel Island, the Onge represent a critical cultural link to the southern reaches of the Andaman group.

Tribe	Location	Racial Group
Onge	Little Andaman	Negrito
Jarawa	Middle & South Andaman	Negrito
Sentinelese	North Sentinel Island	Negrito
Shompen	Great Nicobar (Interior)	Mongoloid
Nicobarese	Nicobar Islands (Widespread)	Mongoloid

In contrast, the Nicobarese tribes exhibit Mongoloid features. The Shompen, a Particularly Vulnerable Tribal Group (PVTG), live in the dense interior of the Great Nicobar Island, which is also a prominent Biosphere Reserve INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Natural Vegetation, p.51. Understanding this north-south divide—Negrito in the Andamans and Mongoloid in the Nicobars—is the first principle of mapping the region's cultural geography.

Sources: Exploring Society: India and Beyond, NCERT Class VII, Geographical Diversity of India, p.21; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Natural Vegetation, p.51

7. Solving the Original PYQ (exam-level)

Now that you have covered the physiography and tribal demographics of India, this question brings those layers together. The Onge tribe represents one of the most ancient Negrito groups in the world. In your study of the Andaman and Nicobar archipelago, you learned that tribal distribution is not random but highly island-specific. This question tests your ability to move from the general "Andaman" category to the specific Little Andaman island, which is the traditional and legal home of the Onge.

The reasoning follows a process of spatial elimination. You must recall that the Negrito tribes (Great Andamanese, Onge, Jarawa, and Sentinelese) are strictly confined to the Andaman group, while the Mongoloid tribes (Shompen and Nicobarese) inhabit the Nicobar group. This immediately makes Little Nicobar and Great Nicobar incorrect choices. Between the remaining options, (B) Little Andaman is the distinct habitat of the Onge, specifically within settlements like Dugong Creek and South Bay, a fact highlighted in Geography of India by Majid Husain.

The trap here lies in the terminological similarity of the island names. UPSC frequently uses "Little" vs. "Great" or "North" vs. "South" to confuse students who have only a surface-level memory of the facts. North Andaman is associated with the Great Andamanese groups, not the Onge. By accurately placing the Onge south of the Duncan Passage on Little Andaman, you avoid the common mistake of mixing up the tribal territories of the northern and southern sections of the archipelago.