Some birds are pollinators that co-evolved with what other type of organism?\nOptions:\n- (A) animals\n- (B) humans\n- (C) vegetation\n- (D) producers\n- (E) parasites\n- (F) warm-blooded\n- (G) Conifers\n- (H) mammals OK. Let's think hard:
User
Some birds are pollinators that co-evolved with plants. If the plant is green, it is a producer. Some birds are pollinators that co-evolved with producers.
So, the final answer is (D).
Assistant