The main role of bacteria in the carbon cycle involves:

In decomposition,detritivores break down detritus into smaller particles. This process is called......

The process of decomposition is delayed when:

In a forest ecosystem,fungi are grouped as:

$A$: Detritivores and decomposers hold up a part of nutrients contained in detritus.
$R$: Immobilised nutrients cannot be available for solubilisation after the death of saprotrophs.

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: