To preserve the health of mankind
Answer:
The skull protects the brain from any direct damage and the vertebrae helps keep the nerves in the spine in place and protected from damage. So the central nervous system is protected by the vertebrae and the skull.
Active immunity
Active immunity is when something triggers an immunity system to produce antibodies, this something being a vaccine. Hope this helps!
Lifting things that are too heavy... pushing too hard. Flexing out, and I think doing this specific workout for your stomach too much.
We might conclude that Joe is more Muscular.
If we're talking about the amount of the hits , it simply come down to technique and concentration.
But if we're talking about distance ( especially if there is a huge difference) It's very likely that it because of the difference in strength. All professional baseball player have a solid upperbody and core strength