Plants of salty seashore wetlands are called

Write a short note on:
$(a)$ Adaptations of desert plants and animals
$(b)$ Adaptations of plants to water scarcity
$(c)$ Behavioural adaptations in animals
$(d)$ Importance of light to plants
$(e)$ Effect of temperature or water scarcity and the adaptations of animals.

Organisms that can tolerate and thrive in a wide range of temperatures are $P$,while those restricted to a narrow range of temperatures are $Q$. Choose the correct option for $P$ and $Q$.
$P \quad\quad Q$

Choose the correct statement:

Match the types of animals in Column-$I$ with their adaptations in Column-$II$:

Column-$I$	Column-$II$
$i$. Eurythermal	$a$. Can tolerate only a narrow range of salinity
$ii$. Stenothermal	$b$. Can tolerate a wide range of temperature
$iii$. Euryhaline	$c$. Can tolerate a wide range of salinity
$iv$. Stenohaline	$d$. Can tolerate only a narrow range of temperature

Which biological factor is responsible for poor vegetation in deserts?