I believe the answer is c
There are systems in your body that do interesting things but the skeletal system and the muscular system help move your body
Answer: The circular mentor permits you to consume 15% a greater number of calories than the activity bicycle. ... At last, the circular bicycle prevails upon on the stationary bicycle as far as calories consumed. Be that as it may, the thing that matters can't and you will prevail with both wellness machines to get more fit on the off chance that you exercise routinely and seriously.
Explanation:
In the middle part of the activity pyramid
