Soil conservation involves protecting and preventing a. soil quality; erosion b. topsoil; pollution c. soil layers; erosion d. soil layers; pollution

Soil conservation involves protecting the soil layers and preventing erosion. Soil conservationists are very concerned with the topsoil, but take all layers into account.

The Correct Answer is A.

Explanation:

Soil conservation is known as the protection of the Soil. There various steps by which we can conserve Soil, some methods are discussed below: More number of trees should be planted to replace the ones that are cut down.  Another measure to conserve soil is Crop Rotation. Trees and grass should be planted in open areas of land to prevent the topsoil of the land which blow away by the wind. Dams should be built across rivers to prevent floods.