Stenohaline fishes are represented by

The forests near the equator are known as .....

In most animals,the metabolic reactions proceed in a $A$ temperature range (in humans,it is $37^{\circ} C$). But there are microbes (archaebacteria) that flourish in hot springs and deep sea hydrothermal vents where temperatures far exceed $B$. Choose the correct option for $A$ and $B$.

Penguins are found in .............. .

The physical space occupied by the organism is called its . . . . . . niche.

Habitat together with the functions of a species constitutes its