The lowers layers below the topsoil are hard and rocky in nature. This is because they lack ___________.

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water

humus

roots

grazing

answer is B.

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Detailed Solution

Humus is the organic matter present in the soil which is responsible for the fertility of the soil. It is only present in the top soil. Due to deforestation, layer of top soil is gradually removed. The lower layers of the soil are hard and rocky in nature because of less amount of humus in it.

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