Answer the following question: You are presented with the quiz "What creates new genetic variation in the gene pool?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mutation creates new genetic variation in a gene pool" and "mutations Mutations are caused by random changes in genes". So, what's the best answer to the question?

OPTIONS: (i). The bending of a ray of light; (ii). passenger pigeons; (iii). peachleaf willow; (iv). Warm air moving into cold air; (v). random changes in genes; (vi). that material's properties; (vii). a tree falling; (viii). By wind and rain;
Answer:
(v).