An artery carries blood the heart. oxygen-rich; away from oxygen-rich; to oxygen-poor; away from oxygen-poor; to

oxygen-rich; away from

An artery carries oxygen-rich blood away from the heart.

Explanation:

All arteries carry oxygenated (oxygen-rich) blood away from the heart except pulmonary artery while all veins except pulmonary vein carry deoxygenated (oxygen-poor) blood to the heart.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

it would be heredity