What did darwin observe about finches in the gal�pagos islands?
a. their feathers were adapted to match their environment.
b. their beaks were adaptations related to the foods the finches ate.
c. they had homologous body structures with other flying vertebrates.
d. they were unrelated to mainland bird species.

what are the options

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.