Question

Wearing down of topsoil is called _______.
A. Washing
B. Erosion
C. Corrosion
D. Denudation

Answer 1

Hint: There are different types of processes in this environment that brings changes in this ecosystem. The dynamic activity of erosive agents like water, snow, ice (glaciers), air (wind), plants, animals and humans cause the natural process.

Complete step-by-step solution:
Washing, Corrosion, and Denudation are other factors that occur in the environment. Erosion is wearing down of topsoil i.e., the displacement of the upper layer of the soil is called soil erosion. It is a form of soil degradation. Erosion is also sometimes divided into glacier erosion, water erosion, wind erosion, and even snow erosion. Large sinkholes are left by the soil erosion in the ground which would weaken buildings and might collapse them. As urban areas are usually protected from soil erosion, many buildings would not collapse. There are several ways to conserve soil erosion. A line of plants that are planted to slow down or stop the wind is called a windbreak. The way to stop the wind from blowing the soil away is to plant a thick row of bushes or shrubs next to the field of crops. Terrace farming also helps in preventing soil erosion. The crops which are grown on a slope should be planted in contour lines that run across the slope. Along the beaches, groynes (wooden planks) would help resist erosion.

Thus, option (B) is correct.

Note: The farmers face a serious problem due to soil erosion. The crops that make food will not grow very well if the soil has eroded. In the 1930s dust bowl, soil erosion was a big problem in the Midwestern United States.