There is no picture of the bird.
The answer is "Tolerance only for cold climates". Hope it helped!
Explanation:
i think they obtain food in order to get the energy they need to carry out life functions
This part of the experiment serves as basis of comparison; the one variable being tested has been omitted Experimental group.This part of the experiment shows the effect of the one variable being tested.Independent variable.This variable is an experiment is the one being deliberately changed by the scientist.
The limiting factors of an ecosystem are Habitat, Space, Resource abundance, or the reproductions<span />