The answer is D. This is a trick question because if you want to maintain you wouldn’t male any changes to your caloric intake.
Jogging. I found this answer by process of elimination. Swimming takes a lot of force, like kicking which gives heavy force on bones, jumping rope, (believe it or not) can also affect his bones since he is "pounding" on the ground. Basketball is much like the jumping rope. But jogging is meant to be a light run, and if you jog the right way, (lightly on your feet) you can stay active and avoid heavy force on bones.
To provide the body with a strong and mobile framework and to allow the body to move. I also I believe the skeletal system Provides the body with a strong mobile....and to supply the body with minerals
The immune system usually protects from bacteria, injury and diseases.