The correct answer is: Alluvial soil.
Alluvial soil is a type of soil that is formed from the deposition of sediment by water. It is typically found in river valleys and deltas. Alluvial soil is rich in nutrients and has a good water retention capacity, making it ideal for growing crops such as cotton.
Laterite soil is a type of soil that is formed from the weathering of rocks in tropical climates. It is typically red or yellow in color and is low in nutrients. Laterite soil is not suitable for growing crops such as cotton.
Black soil is a type of soil that is formed from the weathering of limestone. It is typically dark in color and is rich in organic matter. Black soil is suitable for growing crops such as cotton, but it is not as good as alluvial soil in terms of water retention capacity.
Sandy soil is a type of soil that is composed of mostly sand particles. It is typically light in color and has a low water retention capacity. Sandy soil is not suitable for growing crops such as cotton.