I believe it’s C it delivers more oxygen to the body
I'd say the best action to improve your health would be to frequently exercise, and eat healthy foods.
The significance in thickness between the two is due to the different amount of pressure exerted on the walls of the heart. The left ventricle has a thicker wall because the blood must be pumped throughout the entire body (oxygenated blood), unlike the right ventricle, where blood is pumped simply to the lungs to be oxygenated (pulmonary system).
Answer:
calisthenics is the word you're looking for