Match List I with List II : List I List II A Fragmentation 1 Degradation of detritus into simpler inorganic substances by bacterial and fungal enzymes B Leaching 2 Precipitation of water-soluble inorganic nutrients as unavailable salts in the soil horizon C Catabolism 3 Highly resistant amorphous substance that undergoes decomposition at an extremely slow rate D Humus 4 Breakdown of detritus into smaller particles by

Step-by-step solution

Fragmentation is the process in which detritivores (like earthworms) break down detritus into smaller particles. Thus, A matches with 4. Leaching is the process by which water-soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts. Thus, B matches with 2. Catabolism involves bacterial and fungal enzymes degrading detritus into simpler inorganic substances. Thus, C matches with 1. Humus is a dark-coloured, highly resistant amorphous substance that undergoes decomposition