B. Volcanic Eruption. All of the other ones happen slowly, over millions of years.
Atomic mass - atomic number = neutrons
126.9 - 53 = 73.9 = 74 neutrons
The first event or first thing they do, because the first thing they do is exercise for 2 hours everyday to keep their muscle and bone strength.
Answer:
option b I think I think I am not sure
