Which of the following is a step to prevent soil erosion?

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Deforestation

Excessive mining

Plugging of gullies

Overgrazing

answer is C.

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Detailed Solution

Plugging of gullies is a step to prevent soil erosion.
Plugging of gullies means building check dams or throwing boulders in the gullies to slow down the flow of water through them. The removal of topsoil by external agents like water and wind is known as soil erosion. Gullies refer to the channels formed while water flows down the land. These lands can be blocked to prevent further erosion by building check dams or by planting vegetation. It helps in reducing the rate of soil erosion. Deforestation is a cause of soil erosion. The roots of trees help in holding the soil together, thereby preventing soil erosion. Excessive mining and overgrazing are two common causes of land degradation and soil erosion. Afforestation is a process of recovering the lost forest cover by planting trees.

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