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Birds in different environments have a wide variety of beak shapes. Some beaks are long, and some are short. Some are narrow, and some are broad. Some are pointed and some are dull.
What is the best explanation for why birds have such different beaks?
A. Over many generations, birds developed different beak shapes so they could tell each other apart.
B. Birds change their beak shapes to match the type of food that tastes the best?
C. Over many generations, the birds developed beak shapes that matched the type of food in their unique environments.
D. Birds' beaks were shaped by attacks form other animals or dangerous weather events.
What is over many generations, the birds developed beak shapes that matched the type of food in their unique environments.