Multiple choice

Which of the following is not a layer of soil?

  1. Topsoil

  2. Humus

  3. Middle layer

  4. Horizon C

  5. Bedrock
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is correct. The topmost layer is dark in colour, and contains the remains of dead plants and animals. This rotting matter is called humus. Humus is thus, a part of topsoil, not a separate layer.

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