Answer: The answer is A: muscle tightness
Poor flexibility may be caused by muscle tightness.
Explanation: Muscle tightness refers to when the muscle is hard to move. This is usually accompanied with discomfort, cramp or pain. It happen whenever an individual’s muscle is tight or stiff.
Poor flexibility refers an individual inability to bend, twist and so on. Poor flexibility can cause muscle tightness when an individual cannot stretch his or her muscle. This cause pain to the individual.
