Answer:
Answer is A. Affects genotypic frequencies and not allelic frequencies.
Explanation:
Non random mating is when an individual organism prefer to mate with another organism of the same genotype or different genotype.
There are some things that make this to happen. It may be based on physical accessibility or characteristics among others.
Because these volcanic activities happen on plate tectonics.
This is not the best answer but I hope it could help you.