Refer to the given pic diagram representing composition of soil.
Select the correct option regarding constituents X and Y.

Options

A. X is formed by weathering of parent rock.
B. Y contains nutrients required by the plants for their proper growth.
C. X is composed of gravel, sand, silt or clay.
D. All of these

Answer

D

Explanation

In the given pie diagram X represents mineral matter and Y represents organic matter. Mineral matter is composed of different-sized rock particles formed by weathering of parent rock. There are four types of mineral particles on the basis of their size-gravel, sand, silt and clay. The organic matter like dead and decaying remains of plants and animals present in the soil constitutes humus. Humus is important because it makes the soil fertile as it contains the nutrients required by the plants for their proper growth.