Which of the following is known as "Expending energy by using your muscles to move your body"?

A) Physical activity
B) Exercise
C) Fitness
D) Training

Physical Activity

Any bodily movement produced by skeletal muscles that require energy expenditure, including activities undertaken while working, playing, carrying out household chores, traveling, and engaging in recreational pursuits.

Muscles

Tissues in the body that have the ability to contract, making movement possible.