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

Fungi in a forest ecosystem is

Which of the following acts as $''$nature's scavengers$''$?

In decomposition,leaching is the process of . . . . . . .

Which biotic component primarily helps in the cycling of nutrients in an ecosystem?

Identify the processes $P, Q,$ and $R$ in the following descriptions:
$I -$ The process of breaking down detritus into smaller particles $- P$
$II -$ Bacterial and fungal enzymes degrade detritus into simpler inorganic substances $- Q$
$III -$ Water-soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts $- R$
Select the correct option for $P, Q,$ and $R$.