(a) Algae are small green plants which dies and decomposed into the soil.
(b) Strong blowing wind is a soil erosion agent. It causes top soil to carry away to the distant places
(c) Social forestry started to encourage small farmers and adivasis to plant trees and do agriculture activity on the fallow (empty) and barren land. The number of trees has risen and wood has become available in plenty for the poor people to earn some money.
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