What are three processes that contribute to genetic variation during sexual reproduction

Crossing over – often, the sister homologous chromosomes of a cell exchange genetic material through recombination of genes.Independent assortment/random fertilization – there are numerous variety of ways that the chromosomes of the gametes can combine, after meiosis, through fertilization to form a zygoteMutation – on rare occasion, there is a slight and random change in the genes of a gametic cell caused by environmental factors.

Well i had the same answer, so the correct answer would be a. but in this case it would be the one with plasma membrane and cell wall circled that is next to the hairy pill type of thing.