Which of the following process during decomposition is correctly described?

A

Leaching-water soluble inorganic nutrients rise to top layers of the soil

B

Fragmentation-carried out by organisms such as earthworm

C

Humification-Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate

D

Catabolism- Last step in the decomposition underfully anaerobic condition