$A$ person moves from Delhi to Shimla during the hot summer days. This is an example of which of the following?

In colloquial language,habitat is a postal address while niche is the . . . . . . of the organism.

What is a tree line?

Sal and teak are dominant in

In summer,when the outside temperature is higher than our body temperature,we sweat profusely. The resulting evaporative cooling,similar to what happens with a desert cooler in operation,brings down the body temperature. In winter,when the temperature is much lower than $37^{\circ}C$,we start to shiver,a kind of exercise which produces heat and raises the body temperature. These organisms are called:

The wide variety of natural habitats is based on which of the following?