Physical Features of India

Konkan Kannad and Malabar are regional parts of the western coastal plain. For exams remember their order.

These are parts of the eastern coastal plain along the Bay of Bengal. For exams study coastal names on the map.

The direct answer is A: barchan dunes form through transport and deposition of sand by wind. A barchan is a crescent-shaped sand dune found mainly in dry deserts where wind blows mostly in one prevailing direction and sand is limited. Reasoning: there is loose sand; wind lifts or pushes it; the wind carries it; when its speed or carrying ability decreases, sand is deposited; repeated deposition builds a dune. Option A is correct because this is an aeolian, or wind-made, landform. Option B is wrong because river silt makes fluvial deposits, not desert dunes. Option C is wrong because glacial ice creates glacial landforms. Option D is wrong because coral rock forms in marine environments, not from moving desert sand. Exam cue: dunes indicate wind action; river landforms indicate running water.

Luni is a river of the dry region and does not form a clear marine delta. For exams link Luni with Thar.

The Rann of Kachchh is a low-lying saline plain. During the rainy or wet season, water spreads over parts of the surface and creates seasonal waterlogging. When the hot, dry season arrives, much of this water evaporates. Dissolved salts cannot evaporate with the water, so they remain behind and accumulate as a whitish saline layer on the ground.

Choice A is correct because it presents the sequence in the proper order: seasonal waterlogging, evaporation, and salt deposition. This explains why the surface becomes salty without requiring glaciers, lava, or a river-made doab. A doab is land between two rivers and is not the characteristic process responsible for the Rann’s saline surface. The answer is therefore a physical process of seasonal flooding followed by drying.

Ladakh is cold and dry due to altitude and Himalayan rain shadow. For exams remember the reason for cold desert.

Lakshadweep is coral and Barren Island is a volcanic example in Andaman. For exams keep island origins separate.

Barren Island is known as an active volcanic site in the Andaman region. For exams link it with Andaman.

Majuli is a river island Sundarbans is a delta and Lakshadweep is a coral island. For exams keep landform types separate.

Indira Point is in Nicobar and Kanyakumari is on the mainland. For exams separate southernmost point and mainland southern tip.

Palk Strait is a sea passage between Tamil Nadu and Sri Lanka. For exams identify it on the map.

In both regions moist winds strike hills and rise to give rainfall. For exams remember orographic rainfall.

Thar is a hot low rainfall desert while Ladakh is a cold desert due to altitude and rain shadow. For exams keep them separate.

Deccan Trap is linked with basaltic lava and Lakshadweep with coral. For exams identify by origin.

Himalaya is a result of young plate collision and Peninsular Plateau is an old stable landmass. For exams remember this basic comparison.

The Deccan region shows a relation between basaltic lava and black soil. For exams also remember the cotton region.

The Bhabar and Terai belts occur along the foothills of the Himalayas. Bhabar is formed by coarse pebbles and gravel deposited by streams descending from the mountains. Its porous surface allows streams to disappear underground. South of it lies the Terai, where the underground water re-emerges or remains near the surface, creating a wetter, marshy, and more humid belt.

Option A is correct because the described order is Bhabar followed by Terai. The clues are the pebbly porous material first and the moist marshy land afterward. Khadar and Bhangar are different divisions of the Northern Plains based mainly on newer and older alluvium. Konkan and Malabar are coastal regions, while Thar and Rann are arid or saline areas. Thus, the physical sequence directly identifies Bhabar to Terai.

Rivers like Mahanadi Godavari Krishna and Kaveri form deltas on the eastern coast. For exams remember Bay of Bengal.

Sundarbans is the tidal mangrove area of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Aravalli is among India's very ancient and eroded ranges. For exams remember it as older than Himalaya.

Narmada flows west through a rift valley into the Arabian Sea. For exams treat Narmada and Tapi as exceptions.

Bhabar is a pebbly porous foothill belt of the Himalayas not a tidal marsh. For exams keep Bhabar and Sundarbans separate.

Landforms can arise through very different natural processes. The Deccan Trap was built mainly by repeated volcanic lava flows, which spread over a large area and later solidified into layers of basalt. Lakshadweep, in contrast, consists mainly of coral islands formed by the growth and accumulation of coral organisms in warm shallow marine waters. This pair therefore represents two clearly different origins: volcanic and coral.

Option A is correct because it compares origin rather than simply naming two regions or rivers. Khadar and Bhangar are both types of alluvial deposits, while Konkan and Malabar are coastal regional divisions. Chambal and Betwa are river names. Those pairs do not show as sharp a contrast in the processes that created the landforms.

India's physical diversity is formed by many types of landforms. For exams remember the six major physical divisions.

Reading the order of landforms on a map clarifies the relation between rivers and plains. For exams practice physical maps.