What is the most important factor for the success of an animal population?

During adverse seasons,therophytes survive by:

Nearly all plants and an overwhelming majority $(99\;\%)$ of animals are categorised as

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

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:

Select the incorrect statement with respect to ecotypes.