The law changes because people were disagree about it and there's big difference from now
Answer:
a guess but I think the shifting of tectonic plates
Generally speaking, the chief executive is a member of the legislative branch in a "unitary form of government", since in this government there is only a single governing body.
Generally speaking, it would be earthquakes that do not threaten Central America, due to the fact that there are no major fault lines, although they are still technically possible.