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Question: 1 / 400

What is humus?

a) Technique of growing plants (without soil) in water containing dissolved nutrients

b) Wetness in the atmosphere

c) Material formed from decaying leaves and other organic matter

Humus is a material that is formed from decaying leaves and other organic matter. It is a dark, organic layer of soil that provides necessary nutrients for plants to grow. Option A is incorrect because it describes hydroponics, which is a method of growing plants without soil. Option B is incorrect because it describes humidity, which is the amount of water vapor in the air. Option D is incorrect because it describes a cyclone, which is a type of storm with high winds.

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d) A severe tropical cyclone usually with heavy rains and winds moving a 73-136 knots

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