Which of the following is responsible for the beginning of the detritus food chain?

The process of decomposition is .........

Choose the correct sentences from the options:
$(1)$ Decomposition is largely an oxygen-requiring process.
$(2)$ Warm and moist environment slows down the decomposition process.
$(3)$ Decomposition rate is slower if detritus is rich in lignin and chitin.
$(4)$ Humus is colloidal in nature and it serves as a reservoir of nutrients.

Which of the following processes is correctly described during decomposition?

Decomposition is possible through which of the following?

The organisms which physically and chemically break down complex dead organic remains are known as: