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biology

The top most layer of soil contains

A

Humus, living organism and soil

B

Human, living organism and plants

C

Humans and soil particles

D

Human and microorganism

Answer

The top most layer of soil is said to contain and support a lot of living organisms. It also has organic manure in it that supports the growth and development of plants. 
So, option a "Humus, living organisms and soil" is the correct answer.

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