Q21Long answer
People say that nothing goes waste in a forest. Can you explain, how?
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Hint: (i) Dry leaves and remains of dead animals are converted to a dark csoloured substance called humus. This provides nutrients to the plants. (ii) Dead animals become food for vultures, crows, jackals and insects. (iii) Broken branches of trees are used as fuel by the people living in the vicinity of the forest.