Study the given graph and answer the following:

How many layers of soil are seen in this soil profile?

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2 layers

4 layers

1 layer

3 layers

answer is B.

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Detailed Solution

Four layers of soil are seen in this soil profile.
Soil is a weathered rock containing several minerals and organic materials. Soil is generally porous to allow the percolation of water and air. This is essential for making cultivation possible. The bottom-most layer of soil is the parent bedrock from which the soil is formed. The process of soil development takes years to complete. Over the years, external agents like wind, water, and air erode and degrade the soil to form a substratum. These large particles further get acted upon by the agents of erosion to form the subsoil. With time, the subsoil gets broken down into finer particles and forms a layer of the most fertile topsoil. This soil is suitable for cultivation.

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