Breakdown of detritus into smaller particles by earthworm is a process called

In a particular condition,decomposition rate is slower if detritus is rich in . . . . . . and . . . . . . .

The process of conversion of humified components into manure (mineralization) is carried out by which of the following processes?

Build up of organic material in soil occurs under which of the following conditions?

$A$: 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.

Match List-$I$ with List-$II$ :

List-$I$	List-$II$
$A$. Decomposition	$I$. Accumulation of dark coloured amorphous colloidal substance
$B$. Detritus	$II$. Release of inorganic nutrients by the activity of microbes in soil
$C$. Mineralisation	$III$. Breaking down of complex organic matter into inorganic substances
$D$. Humification	$IV$. Dead remains of plants and animals including fecal matter

Choose the correct answer from the options given below :