What function does the limb serve in each animal? How are the limb bones of the four animals similar? Based on these similarities, what can be inferred about the evolution of the four animals?

answer; i believe the correct answer is (replication is not conservative);

i think that d. wind is the answer.   i missed the question when i answered a. currents.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.