What is the function of the type of muscle that is pictured below?
a. support and movement of the skeleton
b. movement of food through the digestive system
c. contraction and relaxation of the heart
d. generation and conduction of electrical signals

generation and conduction of electrical signals

Explanation:

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i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.