Question : ______ affects the rate of humus formation of soil.
Option 1: Flora and fauna
Option 2: Time
Option 3: Temperature
Option 4: Parent rock
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Correct Answer: Flora and fauna
Solution : The answer is Flora and Fauna.
Generally, the upper layer, or top layer, of the soil consists of the highest humus content. Humus is the organic matter formed by the dead and decaying parts of plants and animals, which are further divided by the microorganisms in the soil.
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