Plants of salty seashore wetlands are called

Halophytes are

What does the density of water depend on?

Match the following biomes with their respective images:

Column-$I$	Column-$II$
$P$. Deciduous forest	$I$. Coastal area
$Q$. Desert	$II$. Tropical rain forest
$R$. Tropical rain forest	$III$. Desert
$S$. Coastal area	$IV$. Deciduous forest

At which latitude,heat gain through insolation approximately equals heat loss through terrestrial radiation?

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 $Q$.
$P \quad\quad Q$