Death is important because it ......

Match the columns:

Column-$I$	Column-$II$
$(a)$ Earthworm	$(i)$ Birth-rate
$(b)$ Succession	$(ii)$ Pioneer species
$(c)$ Population rise	$(iii)$ Pollination
$(d)$ Ecological services	$(iv)$ Saprotrophs

The significance of the study of population is to understand:

The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do $(a)$,$(b)$,and $(c)$ represent respectively?
$(a)$ $(b)$ $(c)$

Match the following and select the correct option.

$A.$ Earthworm	$(i)$ Pioneer species
$B.$ Succession	$(ii)$ Detritivore
$C.$ Ecosystem service	$(iii)$ Natality
$D.$ Population growth	$(iv)$ Pollination

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Logistic growth	$I$. Unlimited resource availability condition
$B$. Exponential growth	$II$. Limited resource availability condition
$C$. Expanding age pyramid	$III$. The percent individuals of pre-reproductive age is largest followed by reproductive and post-reproductive age groups
$D$. Stable age pyramid	$IV$. The percent individuals of pre-reproductive and reproductive age group are same

Choose the correct answer from the options given below: