Solution:
The above statement is true.When plants and animals in the soil begin to decompose, humus, a dark-coloured organic material, is created. The topsoil is kept in place by it. It takes in and holds the water necessary for plant growth. Animals and plants that die and decompose produce humus. Small plants that perish blend with the earth to create compost. These organisms are restricted to the topsoil. The topsoil layer of the soil contains humus, organic minerals, clay, slit, and other decomposed material, which is necessary for plants and crops to grow well.
