Which of the following is an important factor in the formation of soil?

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Relief

Parent rock

Climate

All of these

answer is D.

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Detailed Solution

Important factors in the formation of soil are climate, relief, and parent rock. The climate of a place decides the rate of weathering. The temperature and precipitation conditions influence weathering and decide the mineral composition of the soil. The parent material of the soil decides the type of soil formed. The black soil has basalt rock as its parent contributing to its black colour. They are of volcanic origin. The relief plays a role in deciding soil fertility. The soil on the slopes is more fertile and has greater vegetation cover than the hilltops, but lesser than that in the foothills. Time is another factor influencing the formation of soil.

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