Which of the following provides nutrients and makes the soil fertile?
A
Gravel
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B
Humus
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C
Clay
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D
Loam
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Solution
The correct option is B Humus Decomposers are organisms that feed on plant and animal dead bodies. They convert their complex material into simpler materials. These simple materials are stored in the form of humus, which is a dark-coloured material present in the soil.
Humus contains decomposed leaf litter and animal waste. It is very rich in nutrients. So, it makes the soil fertile.