Fact 1: Some birds are pollinators that co-evolved with plants.

Fact 2: Hummingbirds are the most common bird pollinators.

Given the two facts above, answer the question "Hummingbirds are what they are today as a necessary consequence of their relationship to what?" with the following options: 
- a feeder
 - humans
 - bees
 - survival
 - animals
 - Plants
 - Earth
 - weeds


 

      Plants   