I do not believe that a strong nation should be able to boss around weaker nations. This is just wrong in that a nation should be free to decide what it wants to do. A strong nation can assist them in developing. How ever they should not rule them. At that point that weaker nation will be stripped by of their sovereignty. This is not that times of Empires.
At one point in the early history of the earth, all the continents where merged together as a mega continent called "Pangea". so there actually was no ocean between the land, allowing for dinosaurs to roam freely across the entire land mass. when the land masses split up, the fossils went with them :)
It would be C. Rain. Water is evaporated from the earth into the sky to form clouds. Then it turns into rain that falls to the ground, and this process continues.
I hope this helped if you need a better explanation then ask, and I'll see if I can't provide you with one.
