The answer to this question is, A. Physical!
It keeps us healthy and active. Without water you can become dehydrated and eventually run out of energy.
I personally think narrow hand placements are harder for push ups than the wide medium hand placements for push ups. I think that both of the different hand placements uses different muscles, which may be why I feel that the narrow hand placement is harder. Hope I helped!
Cracked or chapped hands and lips
