Answer:
Beaks determine the type of food birds eat.
Explanation:
The variety of beaks was observed by Charles Darwin on finches on the Galapagos Island, and he noticed that, even though they are essentially the same species, they differ on beak sizes.
The larger beak finches tended to live in areas with a plethora of fruits had larger beaks, while finches that ate primarily insects had shorter but longer beaks.
~
