In all of the cases that I've seen it is usually subtractive, but most of the time it depends on how old the child is.
A I think it would be muscles and bones
Answer:
The activities required when playing volleyball strengthen the upper body, arms, shoulders, thighs, abdominals, and lower legs. In addition, volleyball improves hand-eye coordination, reflexes, and balance. Last but not least, volleyball teaches teamwork and communication and is a great social activity
It depends. On average, soda usually has more, but diet sodas usually have less calories. Hope this helps!