What is an example of ‘Humus’

(A) Soil structure
(B) Crystalloids
(C) Organic colloids
(D) None of the above

Correct Answer : Soil structure
Question Asked : UP PCS Review Officer/Asst. Review Officer (Pre) Exam, 2014
Explanation : Humus is a dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs and other material to the ground, it piles up. This material is called leaf litter. When animals die, their remains add to the litter.
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