Explanation:
In population genetics, the term evolution is defined as a change in the frequency of an allele in a population. ... The allele frequency within a given population can change depending on environmental factors; therefore, certain alleles become more widespread than others during the process of natural selection.
The answer i believe is d.
hope this helps!!
Industry
Cars
Fuel burning
Use of chlorofluorocarbons
I believe the answer would be C. pleas brainliest
