Biology

The correct answer is: B.Sexual selection leading to non-random mating.

Explanation:

Sexual selection involves individuals selecting mates based on certain traits, which causes non-random mating. This disrupts Hardy-Weinberg equilibrium because it leads to certain alleles being passed on more frequently than others, thereby changing allele frequencies over generations.

The other options are incorrect:

A.Random mutations affecting the allele frequencies: Mutations introduce new genetic variations, but they are generally a slo...