Some birds are pollinators that co-evolved with plants.
Hummingbirds are the most common bird pollinators.
Hummingbirds co-evolved with plants.
Hummingbirds are what they are today as a necessary consequence of their relationship to what?
[A] a feeder
[B] humans
[C] bees
[D] survival
[E] animals
[F] Plants
[G] Earth
[H] weeds