Answer:
Afterload is related to the ejection of blood from the ventricle, and preload is related to the filling of the ventricle.
Explanation:
Heart may be defined as the organ that pumps the blood in the whole body. Humans separate the oxygenated and deoxygenated blood in the body and blood helps in the arteries and veins.
The improper blood flow and problem in the heart might result in the heart failure. Two main loading are afterload and preload. Afterload is the pressure that are mainly associated with the blood ejection from the ventricle. Preload is the pressure associated with the filling of the ventricle.
Thus, the correct answer is option (d).