Define decomposition and describe the processes and products of decomposition.

Explanation

Decomposition is the process of breaking down a substance into its constituent parts. It is a complex, enzymatic process that involves stepwise degradation of detritus.
It involves three steps : fragmentation of detritus, leaching and catabolism involving humification and mineralisation. Humification results in formation of humus in soil. Mineralisation results in the release of inorganic substances `(CO_(2), H_(2)O)` and nutrients in the soil.