Answer:
a disease of blood vessels supplying heart muscle, a disease of blood vessels supplying brain ,a disease of blood vessels supplying legs and arm...stroke or heart attack.
Because he wanted the nation not to pick favorite I think and not to make alliances.
Tectonic plates is the answer
If I had to answer I'd say it's because scientists and mathematicians often serve important roles in history! History is a big part of Social Studies, and some of our biggest historical figures are scientists and mathematicians, like the oh so famous Albert Einstein, or Isaac Newton. I hope this helps you somehow! <3