In a forest ecosystem,fungi are grouped as:

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

Which phenomenon causes the materials of a body formed by living organisms to return to the environment?

Decomposition is defined as .....

Given below are two statements:
Statement $I:$
Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement $II:$
Decomposition is faster if the detritus is rich in lignin and chitin.
In the light of the above statements,choose the correct answer from the options given below:

If all decomposers are removed from an ecosystem,what will happen?