Really, this is a simple and easy question.
To make it easier to understand, consider a population of moths. These moths are originally white. The trees in the area are a color that allow the moths to camouflage to escape predation.
There is a particular woodland that these moths most reside in, but as industrialization increases in the area, the emission of smog increases, which darkens the trees, this changing the moth's habitat. Due to this environmental change, some moths become darker in color due to the smog emissions on the tree bark. Some mlths, however, are still bright in color. Due to this environmental change, the bright-colored moths are not able to survive and reproduce, and their population eventually dies out.
This is one of the rather basic examples of natural selection.
To answer your question, therefore, the population would eventually die out, due to those organisms not having the compatible adaption for their environment, which line up with the natural selection principle.
Hope you find this helpful.