Lack of physical activity and genetics.
The correct answer is D. Assimilation occurs when a person uses what he or she already knows and applies it to a new situation.
Answer:
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body. ... Together with the skeletal system, it forms the musculoskeletal system, which is responsible for movement of the human body.
Explanation:
took the quiz
The answer, I believe, is A. self esteem can fluctuate depending on circumstances
