The Coastal Plains and Islands

The Western Ghats lie close to the sea so the western plain is narrow. Exam tip: link the position of ghats with the width of coastal plains.

Rivers like Mahanadi Godavari Krishna and Kaveri form deltas. Exam tip: remember the eastern coast as a deltaic coast.

The Konkan Coast is considered the northern part of the western coastal plain. Exam tip: connect Konkan with the Maharashtra Goa region.

The Coromandel Coast is linked with the southern part of the eastern coastal plain. Exam tip: connect it with the Tamil Nadu coast.

The Malabar Coast is linked with Kerala and has lagoons. Exam tip: remember Malabar with backwaters.

The Eastern Coastal Plain is wide and delta regions are fertile. Exam tip: mention both width and alluvial soil.

Chilika Lake is a lagoon on the eastern coast of Odisha. Exam tip: treat it as a feature of the eastern coastal plain.

The direct answer is option D: small islands formed by coral deposits. Lakshadweep lies in the Arabian Sea and is a group of coral islands. Corals are tiny marine animals that live in colonies and build hard calcium-carbonate structures. Over long periods, these structures can grow around shallow submerged features and form coral reefs, islands, and lagoons. Option D is correct because it identifies the coral origin of Lakshadweep. Option A is wrong because Lakshadweep is not a folded extension of the Himalayan mountain system; the Himalayas are continental fold mountains far to the north. Option B is wrong because delta islands are made mainly from river-borne silt deposited near a river mouth, whereas Lakshadweep is coral in origin. Option C is wrong because the islands are not continental islands formed from volcanic ash. The key school-level classification is Lakshadweep: coral islands in the Arabian Sea. Do not confuse it with the Andaman and Nicobar Islands, which are commonly associated with different geological features. Memory cue: Lakshadweep means lagoon-and-coral island group.

Andaman and Nicobar extend north south in the Bay of Bengal. Exam tip: distinguish them from Lakshadweep by location.

Lakshadweep lies to the west and Andaman Nicobar to the east. Exam tip: do not interchange sea and bay locations.

Northern Circars and Coromandel Coast are parts of the eastern coastal plain. Exam tip: remember them as sections of the eastern coast.

Long east-flowing rivers deposit sediments and form deltas. Exam tip: connect deltas with river deposition.

Direct answer: Option A is correct. A delta forms when a river slows near its mouth and deposits much sediment. The Western Coastal Plain is narrow, and many west-flowing rivers are short, swift, and descend steeply from the Western Ghats. Their water reaches the Arabian Sea quickly, so there is less time and space for a large sediment fan to build. Estuaries are therefore relatively common; an estuary is a widened tidal river mouth where fresh water mixes with seawater. Option A gives the complete physical reason. Option B is wrong because the Arabian Sea lies along the western coast. Option C is wrong because most western rivers are Peninsular rivers, not Himalayan rivers. Option D is wrong because the western coastal plain is narrower, not much wider, than the eastern plain. Memory cue: western coast—short, swift rivers and estuaries; eastern coast—larger deltas.

Indira Point is in Great Nicobar Island. Exam tip: remember the southernmost point with the 2004 tsunami.

Pitti Island is known for a bird sanctuary in the Lakshadweep region. Exam tip: connect it with biodiversity.

Mahanadi, Godavari, Krishna, and Kaveri are major rivers flowing eastward across the Indian peninsula. They carry large quantities of soil and other sediments from their drainage areas. Near the eastern coast, their flow becomes slower and divides into smaller distributaries. The deposited sediment builds broad, fertile deltaic plains at the river mouths.

Therefore option A is correct: these rivers form extensive deltas on the eastern coast. They do not all drain into the Arabian Sea; they generally enter the Bay of Bengal. Their work is not limited to making waterfalls, and they do not end the coastal plain. The eastern coastal plain is especially known for broad river deltas, while some western rivers more commonly form estuaries because of the narrower coastal plain and different relief. The supplied answer is accurate.

Large river deltas occur on the eastern coast. Exam tip: connect delta coast with the Eastern Coastal Plain.

Lagoons are shallow coastal water bodies linked with the sea. Exam tip: remember Chilika and Malabar backwaters as examples.

The direct answer is D: it is a narrow strip between the Western Ghats and the Arabian Sea. A coastal plain is low land beside the sea. In western India, the Western Ghats stand close to the Arabian Sea, leaving only a relatively narrow, long strip of plain between the mountains and the shore. This long, narrow arrangement explains the linear structure of the Western Coastal Plain. Option D is correct. Option A is wrong because the Western Coastal Plain runs generally north-south along the Arabian Sea; it is not an east-west extension parallel to the Himalayas. Option B is wrong because it is outside, not inside, the Bay of Bengal. Option C is wrong because the western plain is not made only of river deltas; it also includes coastal deposits and varied landforms, while large deltas are especially characteristic of the eastern coast. The memory picture is simple: Western Ghats on one side, Arabian Sea on the other, and a thin coastal belt between them.

Coral islands are fragile ecosystems. Exam tip: connect islands not only with location but also with ecology.

India’s coastal plains are divided into several regional sections, and each section is associated with particular states or coastal locations. The Malabar Coast lies along the southwestern coast and is especially associated with Kerala. The Konkan Coast is farther north, mainly along Maharashtra and Goa. The Coromandel Coast lies on the southeastern coast, mainly along Tamil Nadu and nearby areas. The Northern Circars belong to the eastern coast, especially the Andhra–Odisha region.

Therefore, choice B, Malabar Coast—Kerala, is the correct match. Choice A is wrong because Konkan is not the coastal section of Odisha. Choice C is wrong because Coromandel is not Gujarat, and choice D is wrong because Northern Circars are not in Maharashtra. The most useful state clue here is “Kerala—Malabar,” which directly confirms the correct pair.

Their position is important in India's southeastern maritime region. Exam tip: study location and importance together.

The western coast order from north to south is Konkan Kannad Malabar. Exam tip: remember the map order from top to bottom.

River deposition plays a very important role in the Eastern Coastal Plain. Exam tip: treat alluvial deposition as a key term.

The Western Coastal Plain lies along the Arabian Sea. Exam tip: connect west with Arabian Sea and east with Bay of Bengal.