Respuesta :
Answer:
B. Evolution
Explanation:
The change in allele frequencies from mostly light wings to dark wings has been commonly studied in evolution. It's a great example of natural selection favoring the more fit phenotype, in this case the dark that can blend in better with darker trees and darker, smoggy environment.
- Why not competition: This doesn't have to do with limited resources.
- Why not acquired: Lamarck's theory of acquired traits is defunct!! Don't fall for it!!
- Why not overpopulation: This was not hinted at in the question.