The correct answer is: Laterite soil.
Laterite soil is a type of soil that is rich in iron and aluminum oxides. It is typically found in tropical and subtropical regions, and it is often used for agriculture. However, laterite soil is also very prone to leaching, which is the process of water dissolving and carrying away nutrients from the soil. This can make laterite soil less fertile over time.
Sandy soil is a type of soil that is made up of mostly sand particles. It is typically found in dry and sandy regions, and it is not very good for agriculture. This is because sandy soil does not hold water well, and it does not have a lot of nutrients.
Black soil is a type of soil that is rich in organic matter. It is typically found in the Deccan Plateau of India, and it is often used for agriculture. Black soil is very fertile, and it is well-drained.
Red soil is a type of soil that is rich in iron oxide. It is typically found in tropical and subtropical regions, and it is often used for agriculture. Red soil is not as fertile as black soil, but it is still a good choice for agriculture.
In conclusion, laterite soil is the most prone to leaching because it is rich in iron and aluminum oxides. These minerals are easily dissolved by water, which can lead to the loss of nutrients from the soil.