The decomposition of organic compounds in the presence of $O_2$ without the development of odoriferous substances is known as:

In the given statements, select the correct option for the process of decomposition.
$(1)$ Moist environment favours decomposition.
$(2)$ Low temperature and anaerobiosis inhibit decomposition.
$(3)$ Decomposition is slower, if detritus is rich in nitrogen.
$(4)$ Decomposition is quicker if detritus is rich in chitin.
$(5)$ Warm environment favours decomposition.

Which of the following organisms form the decomposers?

The products of the decomposition process are:

Decomposition rate is slower if detritus is rich in........

Which of the following statements is correct regarding Humus?
$(P)$ It is colloidal in nature.
$(Q)$ It is rich in nutrients.
$(R)$ It is highly resistant to microbial decomposition.