Till this day We are always learning more and more so I think this can be helpful for future vaccines of diseases
C is the answer. Due to the current state of the world economy; people, if left to their own devices, would fish as much as possible so they can sell their fish to make money. Current technology means we can catch as many fish as we want (trawlers etc.). The problem with this is that there is only a finite amount of fish in the sea. If we were to fish them without limits in place, we could cause them to go extinct.
I believe that it is because when you put the hand on ice it causes the hand too cool and prevents/slows the rate at which the nerves get damaged.
5km/h but always changing direction
I can’t really see the numbers but it seems to be 30ml