Which of the following option is incorrect for given statements ? (i) Decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients. (ii) Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. (iii) The important steps in the process of decomposition are fragmentation, leaching, catabolism, humification and mineralisation. (iv) Detritivores break down detritus into smaller particles. (v) Humus is resistant to microbial action and undergoes decomposition at an extremely fast rate. (vi) Decomposition is largely an anaerobic process.