Someone who is good at basic biology please help
-use your own words-

Natural selection can only fail if there is variation among members of the same species. ... Variation in a population effect from change and the rejoining of alleles during meiosis and fertilization.

Explanation:

Hope this helps!

i think that the best answer would be c.

tell me if im wrong : )

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;