Natural selection can only take place if there is

Natural selection can only take place if there is variation, or differences, among individuals in a population. ... Mutation, a change in DNA, is the ultimate source of new alleles, or new genetic variation in any population. The genetic changes caused by mutation can have one of three outcomes on the phenotype.

Explanation:

Natural selection can only take place if there is variation, or differences, among individuals in a population. ... Mutation, a change in DNA, is the ultimate source of new alleles, or new genetic variation in any population. The genetic changes caused by mutation can have one of three outcomes on the phenotype.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;