Which one of the following processes during decomposition is correctly described?
A. Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate.
B. Catabolism - Last step in the decomposition under fully anaerobic condition.
C. Leaching - water soluble inorganic nutrients rise to the top layers of soil.
D. Fragmentation - Carried out by organisms such as earthworm
