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The topmost soil layer containing humus and living organisms is the:

ASubsoil
BRegolith
CTopsoil
DBedrock
Answer & Solution
Correct answer: C. Topsoil
1. Its quality decides local biodiversity. 2. It is called the topsoil. 3. Erosion removes it quickly when bare. _Source: syllabus Science, Chapter 14, Natural Resources._
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