How can changes on earths surface affect changes below surface

There are several changes that occur on the earth's surface but also affects the changes below the surface, some of them are as follows:

When rainfall occur on the sandy surface on earth, it looses the soil under the surface and can cause landslides.Imbalance in the food chain above or on the earth surface can affect the nutrient quantity below the surface that is essential for soil bacteria and other microorganisms.Deforestation can also loosen the soil and soil under surface can shift its position.Use of chemicals on agriculture surface can lead to change the fertility of soil below the surface.

A) early horses is your answer