Q.

What causes soil erosion?


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a

Degradation or denudation of soil cover.

b

Human activities like deforestation, construction, and mining.

c

Natural forces like wind glaciers and running water.

d

Both 2 and 3. 

answer is D.

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Detailed Solution

Soil erosion is caused by human activities like deforestation, construction, and mining and natural forces like wind glaciers and running water. Soil erosion is the process of the soil cover being destroyed and then washed away. Both soil production and erosion are ongoing processes, and often there is a balance between them. Running water carves down deep valleys and channels through the clayey soils. The land becomes unusable for farming and is referred to as bad land. Such areas are known as ravines in the Chambal basin. Water can occasionally flow down a hill in sheets across multiple regions.
 
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