Answer:
(i) The big and heavy rocks are broken into smaller pieces. (ii) Soil is formed by breaking down of rocks by the action of wind, water and climate. This process is called weathering. (iii) The smaller particles of the rocks obtained due to weathering get further decomposed on long exposure to air and moisture. (iv) Finally the decomposed parts of dead plants and animals get mixed up with soil formed by above processes. This gives the soil enough fertility in the form of organic matter.
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