When organisms change their location to escape unfavourable harsh environment,it is called . . . . . . .

An elephant has very few hairs,while a bear has thick fur because the bear:

$A$ population characteristic of a species susceptible to extinction is

Define/Explain: Ecological niche.

Select the correct statement with respect to adaptations.

Given below are two statements:
Statement $I$: Stenohaline animals tolerate a wide range of salt concentration.
Statement $II$: Euryhaline animals are capable of handling a narrow range of salt concentration.
In the light of the above statements,choose the most appropriate answer from the options given below: