Match Column-$I$ with Column-$II$ and choose the correct option.

Column-$I$	Column-$II$
$a.$ Aestivation	$(i)$ Over wintering
$b.$ Hibernation	$(ii)$ Over summer
$c.$ Diapause	$(iii)$ Suspended development in zooplanktons

Deserts occur in areas of

Tiny free-living animals on the surface of water constitute:

Match the following types of adaptations in Column-$I$ and Column-$II$.

Column-$I$	Column-$II$
$i$. Morphological	$a$. Crassulacean Acid Metabolism
$ii$. Physiological	$b$. Migration of birds
$iii$. Behavioural	$c$. Leaves reduced to spines in Opuntia

Community is:
$I.$ Group of independent,interacting populations of same species
$II.$ Group of independent and interacting populations of same species in specific area
$III.$ Group of independent interacting populations of different species in a specific area
$IV.$ Group of independent and interacting populations of different species in different area
Select the correct option.

Assertion $A$: Aquatic organisms do not experience mechanical shocks while swimming in water.
Reason $R$: Water is a liquid medium for swimming.
Which option is correct for Assertion $A$ and Reason $R$?