What components make up the natural structure (environment)?

Identify $B$ from the given diagram showing different biomes based on mean annual temperature and mean annual precipitation.

Match the following columns:

Column-$I$ (Temperature)	Column-$II$ (Habitat)
$P$. Sub-zero levels	$I$. Thermal springs
$Q$. Can exceed $50^{\circ}C$	$II$. Polar regions
$R$. Can even exceed $100^{\circ}C$	$III$. High altitude areas
	$IV$. Deep-sea hydrothermal vents
	$V$. Tropical deserts

Consider the following statements $(A - D)$ each with one or two blanks.
$(A)$ Some snails go into $ . . . . . . (i) . . . . . . $ to avoid $ . . . . . . (ii) . . . . . . $ related problems.
$(B)$ Since small animals have a $ . . . . . . (iii) . . . . . . $ surface area relative to their volume,they tend to lose body heat $ . . . . . . (iv) . . . . . . $ when it is cold outside.
$(C)$ Next to temperature,$ . . . . . . (v) . . . . . . $ is the most ecologically important environmental factor.
$(D)$ Every $ . . . . . . (vi) . . . . . . $ the famous Keoladeo National Park in Rajasthan hosts thousands of migrating birds.
Which one of the following options gives the correct fill-ups for the respective blank numbers from $(i)$ to $(vi)$ in the statements?

$-1^{\circ}C$ to $13^{\circ}C$ annual variations in the intensity and duration of temperature and $50$ to $250 \; cm$ annual variation in precipitation account for the formation of a major biome as:

Which of the following is not a part of the atmosphere?