Answer :
By looking at how the birds interact with fruits in different environment, you can determine where birds are from, what beaks specialize in eating what kind of food, and how those traits came to be (Darwinism)
Answer:
1.
The independent variable is the type of food available.
2.
The dependent variable is the frequency of each type of beak (or number of birds with each beak type).
Explanation:
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