Which of the following BEST describes the effect that natural selection might have on a species over time?

The fur color of a species will always change over time, because of natural selection.
Members of a species with traits that allow them to survive and reproduce in an environment will increase in population, while those without those favorable traits will die.
Predator species will always increase due to natural selection, while prey species will always die out.
Bigger members of a species always have an advantage over smaller members. Therefore, over time, a species will eventually include larger organisms only.

Members of a species with traits that allow them to survive and reproduce in an environment will increase in population, while those without those favorable traits will die.