Explanation:

- Coastal Plains:

- Mostly located along India’s eastern and western coastlines.

- Have alluvial and laterite soil, but not black soil.

- Northern Plains:

- Stretch across northern India, formed by river deposits.

- Known for rich alluvial soil, not black soil.

- Deccan Trap:

- Located in central India, covering states like Maharashtra and Madhya Pradesh.

- Composed of volcanic basalt rocks that weather into black soil.

- Black soil is ideal for cotton cultivation.

- Correct Answer: Deccan Trap

- Himalayas:

- A mountain range in northern India.

- Soils found here are generally shallow and immature, not black soil.