Question

Which of the following prevents soil erosion?
A: Afforestation
B: Eutrophication
C: Deforestation
D: None of the above.

Answer 1

Hint: Soil erosion is a form of soil degradation caused by the dynamic effect of wind, air, soil, human and other natural process. The fertility of the land gets affected due to soil erosion. There are many ways to prevent the soil erosion that includes maintaining plant cover, growing vegetables and cleaning and fertilising it.

Complete answer:
-Soil erosion is a geological process in which the fertility of soil gets affected. It is caused by many natural process include air, soil, human etc
-It is very important to prevent soil erosion as it decreases the productivity of the agricultural land and degrades the ecosystem.
-Afforestation is the best way to prevent soil erosion as planting the trees holds in soil that prevent the washing of the fertility of the soil.
-Afforestation helps in the retention of water and thus conserves soil.
-Eutrophication is excessive accumulation of the water that induces the growth of algae.
-The algae produces toxins which are harmful for soil.
-Deforestation is the decrease of forest area due to urbanisation adversely affecting the cultivation, agricultural farming.

Hence, the correct answer is option (A).

Note: Soil erosion is a geological process in which fertility of the soil gets affected. It is caused by various ways including wind, water and humans. There are various ways to prevent soil erosion as the soil erosion affects badly the productivity of the agricultural land and degrades the ecosystem function. Afforestation and reforestation is the best way to prevent to soil erosion. Eutrophication and deforestation has harmful effects on the soil.