alleryThe removal of the upper, fertile layer of soil by the action of wind and water is called:
ASoil erosion
BDeforestation
CDesertification
DAfforestation
Answer & Solution
Correct answer: A. Soil erosion
1. The top soil layer holds humus and mineral salts vital for plant growth.
2. Its removal by wind and water is defined as soil erosion, which lowers soil fertility.
3. Deforestation is loss of forests, desertification is land turning to desert, and afforestation is planting trees, so B, C and D are wrong.
4. Hence the answer is A.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Environmental Management", p.325_
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