Through synthesis of new proteins
Answer:
What sends oxygenated blood back to the heart from the lungs?
Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.
Explanation:
The male deer fight for mates and the winner of the fights gets to breed with said females, the larger the antlers the more likely they will win also, the males that are strong are the ones the females want to breed with because their offspring have a bigger chance of survival.
The answer is D. Headwaters
