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Which of the following resembles the rich topsoil in context to solid waste composting?

(a) Humus

(b) Bed rock

(c) Sub soil

(d) Weathered rock

This question was addressed to me in final exam.

My question is based upon Basic Aspects of Solid Waste Management in section Biotechnology for Solid Waste Management of Environmental Biotechnology

1 Answer

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Best answer
The correct answer is (a) Humus

The explanation: The dark substance in the top layer of the soil which looks like peat and has a powdery texture is humus, sub soil, weathered rock bed rock are the subsequent layers after the top layer.

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