Match the following Column-$I$ with Column-$II$:

Column-$I$	Column-$II$
$(i)$ Sedimentary cycle	$(P)$ Primary consumer
$(ii)$ Gaseous cycle	$(Q)$ Carbon
$(iii)$ Herbivore	$(R)$ Tertiary consumer
$(iv)$ Top carnivore	$(S)$ Sulphur

$A$: 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.

Read the following statements carefully and answer the question:
$(1)$ Pyramids of number and biomass can be upright or inverted in an ecosystem.
$(2)$ Phosphorus and sulfur are sedimentary cycles.
$(3)$ The largest reservoir of carbon on Earth is found in the oceans.
$(4)$ The structural and functional unit of ecology is the ecosystem.
Which of the above statements are correct?

At which trophic level are carnivorous plants included?

Match the columns:

Column-$I$	Column-$II$
$(i)$ Primary succession	$(i)$ Development of ecosystem
$(ii)$ Ecological succession	$(ii)$ Lichens
$(iii)$ Pioneer species on rocks	$(iii)$ Near to the equilibrium with the environment
$(iv)$ Climax community	$(iv)$ New species on bare environment

Which one of the following is not a functional unit of an ecosystem?