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Which one of the following processes during decomposition is correctly described?

1. Humification-Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at every fast rate
2. Catabolism-Last step decomposition under fully anaerobic condition
3. Leaching-Water soluble inorganic nutrients rise to the top layers of soil
4. Fragmentation-Carried out by organisms such as earthworm

Correct answer: Fragmentation-Carried out by organisms such as earthworm

Solution

Fragmentation is the process where detritivores like earthworms break down detritus into smaller particles, aiding decomposition.

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