Fact 1: Plant reproduction often requires pollen. Fact 2: Bees are usually required for effective pollen transfer. Given the two facts above, what does plant reproduction often require?

Available choices:
[A]. DNA.
[B]. global warming.
[C]. energy.
[D]. droughts.
[E]. seeds.
[F]. bees.
[G]. food.
[H]. legumes.
Answer:
[F].