Q: You are presented with the quiz "what is required for reproduction?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plant reproduction often requires pollen" and "pollens originate from plants".   So, what's the best answer to the question?

Options: [i] roots; [ii] courtship; [iii] pollen; [iv] DNA; [v] leaves; [vi] flowers; [vii] hormones; [viii] seeds;
The answer is:
[iii]