Question

Which of the following prevents soil erosion?
A. Allowing herbivorous animals to graze excessively.
B. Growing plants to form a soil cover
C. Increasing fertility of the soil
D. Making the land sloppy

Answer 1

Hint:- The uppermost layer of earth's crust formed by weathering of rocks is called soil. It is a mixture of living and non-living materials.
The nature and properties of soil are dependent on the climate, the weathering process, whether the soil is transported or sedimentary and how soil development occurred.

Complete answer:-
The degradation of soil caused by natural activities is called soil erosion. Due to soil erosion, the upper layer of soil is displaced thus degrading a fertile land. Due to soil erosion cultivation of crops has ceased.
Excessive grazing by herbivores will lead to degradation of land by removing the uppermost layer of soil, thus leading to soil erosion.
Nowadays for the better yield of the crops, pesticides and fertilizers are excessively used by farmers. This decreases soil fertility. To increase the fertility of soil chemical methods are used. If these are used excessively then it will decrease the soil fertility.
Some crops are used to prevent soil erosion. These are called cover crops. They firmly adhere to soil particles thus preventing the displacement of soil. Thus growing plants to form soil cover decreases soil erosion.
Sloped lands also aid in soil erosion. As the land is sloppy, rainwater will remove the upper layer of soil causing soil erosion.

Thus the correct answer is option B.

Note:- For the proper growth of a plant, the condition of the soil must favour its growth. Adequate temperature, moisture and grain size of soil are required for the healthy growth of the plant.
As a result of weathering, the mineral particles of different sizes are formed. The soil has a high water-holding capacity, high aeration and high root penetration are considered as best soil for cultivation.