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Micro-organisms act upon the dead plants to produce- sand
- mushrooms
- humus
- wood
Correct answer: (iii) humus
Explanation: Microorganisms act upon the dead plants to produce humus. Humus is the organic component of soil. It is formed by the decomposition of leaves and other plant material by microorganisms present in the soil.
Extra information: Forests are a very important renewable natural resource. Decomposers are the organisms that feed on the dead bodies of plants and animals. They convert complex organic molecules present in dead and decay matter into simple inorganic molecules and allow them to mix with the soil. Thus, they help to recycle nutrients. They clean the forest decaying dead bodies and replenish the nutrients back to the forest soil.
Some decomposers are bacteria, fungi, beetles and grubs.
Decomposers play an important role in clearing the debris of dead remains of plants and animals and converting them into humus which enriches the nutrients of the soil. Forests also play an important role in cycling nutrients on the earth. ]
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