Humus is

Identify the correct statements:
$A.$ Detritivores perform fragmentation.
$B.$ The humus is further degraded by some microbes during mineralization.
$C.$ Water-soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
$D.$ The detritus food chain begins with living organisms.
$E.$ Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the options given below:

What is common to earthworm,mushroom,soil mites,and dung beetle in an ecosystem?

What is decomposition? Explain.

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

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.