Which major physiographic division of India is associated with sand dunes?

Correct answer: Indian Desert

The direct answer is option A: the Indian Desert is associated with sand dunes. A sand dune is a mound or ridge of sand formed and moved mainly by wind. The Indian Desert, commonly called the Thar Desert, has a dry climate, little rainfall, sparse vegetation and many wind-shaped sandy surfaces. Option A is correct because dunes are a familiar landform of this desert region. Option B is wrong because the Northern Plains are mainly flat alluvial plains made by river deposits; they are not identified by desert dunes. Option C is wrong because the Himalayas are high, rugged mountains with snow, valleys and slopes, not a desert dune landscape. Option D is wrong because island groups are surrounded by water and are identified by island and coastal features, not broad desert dunes. Some sandy places can occur elsewhere, but the major physiographic association in this question is the Indian Desert. Memory cue: wind-blown sand heaps point to the Thar or Indian Desert.