Answer:
Tom felton, Robbert Patterson
I'd have to say gas because it usually doesn't change at all
I would say that the US and the Soviet Union at the end of WWII withdrew their troops as soon as a demilitarized zone was created. Also, I am sure they would require a peace treaty to be signed with Germany before withdrawing troops.
Cays- they are formed when ocean currents transport loose sediments across a surface of a reef to a despositional node