ANSWER: A) Physical activity aimed at increasing fitness.
EXPLANATION: D) is a good candidate for this question but if you lift your arm it would be considered physical movement and obviously you can’t say “yeah i worked out today i lifted my arm” lol. The body being in good condition isn’t exercising. Using machines at the gym is a form of exercise but you can do other things to, so therefore your answer is A) Physical activity aimed at increasing fitness.