Biology

The correct answer is: B.It introduces new alleles, altering allele frequencies.

Explanation:

Migration (also known as gene flow) occurs when individuals from one population move to another, bringing their alleles with them. This can introduce new alleles into the population or change the frequency of existing alleles, thus altering allele frequencies.

This violates one of the key assumptions of Hardy-Weinberg equilibrium, which states that there should be no gene flow (migration) between populations. Therefore, migration does not cause allele frequencies to remain c...