The correct answer is (d) Alluvial soil.
Alluvial soil is a type of soil that is formed from the deposition of sediments by water. It is a rich, fertile soil that is well-drained and has a good water retention capacity. Alluvial soil is ideal for the cultivation of cotton, as it provides the nutrients and moisture that the crop needs to grow.
Red soil is a type of soil that is formed from the weathering of igneous rocks. It is a clayey soil that is low in organic matter and nutrients. Red soil is not ideal for the cultivation of cotton, as it does not provide the nutrients and moisture that the crop needs to grow.
Black soil is a type of soil that is formed from the weathering of limestone. It is a rich, fertile soil that is high in organic matter and nutrients. Black soil is ideal for the cultivation of a variety of crops, including cotton.
Sandy soil is a type of soil that is composed of sand particles. It is a light, loose soil that is low in nutrients and organic matter. Sandy soil is not ideal for the cultivation of cotton, as it does not provide the nutrients and moisture that the crop needs to grow.