Explain how the shape of a finch's beak is an example of adaptation.

The shape of a finch's beak is different according to what food it eats.

Source:7th grader; learned about this

the answer is d.) homologous; have mammary glands

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.