Select from:
(A). tapeworms
(B). glycogen
(C). cellulose
(D). smells
(E). hormones
(F). RNA
(G). Echinoids
(H). pollen
Q: Fact 1: An animal needs to attract a mate to reproduce. Fact 2: Animals mate because of smells. Given the two facts above, what do animals use to reproduce?
A:
(D).