Biogeochemical cycles can be traced in

Match the following columns.

Column-$I$	Column-$II$
$(a)$ Phytoplankton,grass	$(p)$ First trophic level
$(b)$ Man,Lion	$(q)$ Herbivore
$(c)$ Zooplankton,Cow,Grasshopper	$(r)$ Third trophic level
$(d)$ Birds,Wolf	$(s)$ Top carnivore

Carbon constitutes . . . . . . of dry weight of organisms and . . . . . . percentage is dissolved in oceans out of total global carbon.

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

List-$I$	List-$II$
$a$. Carbon dissolved in oceans	$i$. $55$ billion tons
$b$. Annual fixation of carbon through photosynthesis	$ii$. $71 \%$
$c$. $PAR$ captured by plants	$iii$. $4 \times 10^{13} \ kg$
$d$. Productivity of oceans	$iv$. $2$ to $10 \%$

Choose the correct answer from the options given below:

$A$: Neither the community modifies the environment nor the environment forces the community to leave the place in the climax stage of succession.
$R$: Climax community is xerophytic in most of the types of succession.

Identify the mismatched event from the following structures.