The breakdown of detritus into smaller particles by earthworm is a process called Humification, Fragmentation, Mineralisation, or Catabolism?

Humification is the process of partial decomposition of detritus to form humus. Fragmentation is the process of breakdown of detritus in which a part of detritus is eaten by detritivores (such as earthworms) and comes out in the highly pulverized state in their feces. Mineralization is the release of inorganic substances from organic matter during the process of decomposition. Catabolism is carried out by saprotrophic bacteria and fungi. They secrete digestive enzymes over the fragmented detritus. The enzymes change complex organic compounds into simple compounds and inorganic substances are also released in this process. So, the correct answer is 'Fragmentation'.