Please help me ?

W

Explanation:

"Potential energy" refers to the energy within an object in relation to its position. The most common form of potential energy is the "gravitational potential energy." This kind of potential energy is directly proportional to the height of an object.

As seen on the diagram above, the tallest height is at W. It means that, the potential energy at this point is at its greatest because of a greater gravitational pull from the Earth. On the other hand, the potential energy is least at point X because it has the shortest height and is closer to the Earth.

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.

i think the answer would be d