Which of the following refers to the ability to move a joint through its complete range of motion?
a. septicityb. plasticityc. agilityd. flexibility

D. Flexibility is the correct answer.

Explanation:

Flexibility refers to the ability to move a joint through its complete range of motion.Flexibility refers to the movement of the muscles and joints freely.Flexibility is necessary for fitness because it provides better performance during performing exercising and  and prevents injuriesFlexibility helps the body to withstand stress and pain and also it makes twisting, exercising, and lifting more comfortable.Flexibility training improves the motion of the bones and muscles that helps to decreases the risk of pain and injury and it also strengthens the muscles.