Soils in Meghalaya’s valleys tend to be:

The correct answer is: b) More fertile with alluvial deposits.

Alluvial deposits are sediments that are transported and deposited by water. They are typically rich in nutrients and minerals, making them ideal for agriculture. The valleys of Meghalaya are located in the Brahmaputra River basin, which is a major source of alluvial deposits. As a result, the soils in these valleys are very fertile.

The other options are incorrect for the following reasons:

• Option a) is incorrect because sandy soils are typically less fertile than other types of soil.
• Option c) is incorrect because highly acidic soils are not ideal for agriculture.
• Option d) is incorrect because clay soils are not typically as fertile as other types of soil.