Question

question 7
how is the kettlewell peppered moth study an example of natural selection?
the moth study is not a valid example of natural selection.
the dark moths formed as a result of the increased pollution in the area.
the study shows that the already existing variations in the populations shifted in favor of the color that was best
suited to the changes in the environment.
the study shows that when the environment changed and the individual moths that were able to change color
were able to survive and reproduce.

Explanation:

Natural selection is the process where organisms with traits better adapted to their environment survive and reproduce more successfully. In the Kettlewell peppered moth study, there were already light - colored and dark - colored moth variations. Due to environmental changes (like pollution darkening the trees), the dark - colored moths (which were better camouflaged) became more prevalent as they had a survival advantage. It's not about moths changing color individually (they don't change color like chameleons), and the dark moths didn't form because of pollution (the variation already existed). Also, the study is a valid example of natural selection.

Answer:

The study shows that the already existing variations in the populations shifted in favor of the color that was best suited to the changes in the environment.