The least likely explanation for this would be that they're training at different intervals, or one is training harder than the other.
The most likely reason is that the way the other person's genetics are most people cant gain muscle as well as others because of disease or their body structure.
Hope this helped!
Prenatal care. Care done before the birth of her child
I think the right answer to your is A I’m not for sure
True. But after working out you also need to stretch the same key muscles
Answer: It is muscular strength
Explanation: Muscular strength is lifting weights
Hope this help! :)