Question

A species of birds exists in stasis for many thousands of years. Suddenly, their environment changes, causing their primary tree of sheltering choice to die. To adapt to their new environment, the birds must nest in trees that are much higher, requiring more wing strength. Some birds die. The remaining birds have the wing strength necessary for the new habitat and thus, return to a state of stasis. This is an example of ____________

Answer 1

Its D punctuated evolution

Answer 2

This is an example of natural selection.

Step-by-step explanation:

Darwin proposed the theory of natural selection according to which nature constantly changes and the changes environment may or may not be suitable for the existing populations. When the environment changes, organisms which are capable to adapt themselves in the new environment will make the future generations and thus will dominate. In the above case, some birds could adapt themselves during their struggle for existence. The birds with more wing strength got selected by the nature i.e. natural selection.