<span>A. Biosphere
Hope this helps.</span>
The answer is no. The Caucasus Mountain does not separate European Russia from Asian Russia. It was the Ural Mountains that separates the European Russia from Asian Russia. Ural Mountains is a mountain range that stretches approximately from northwestern Kazakhstan through the western part of Russia.
Glaciers shaped the landscape is the answer. Actually, in Nova Scotia near Halifax there is a glacial boulder or erratic of basalt which is deemed to come from about 130km away perhaps from the north or NW. Also, there are glacial striations there on the bedrock which can be used to determine the sense of the direction of flow of the ice. In New England, there are pro-glacial lakes. Both the Maritimes and New England were most likely covered by the Laurentide continental glaciation.
The Inca empire was based in Peru. Note that the empire spread in more countries then just the seat of the empire, like Ecuador, Bolivia, Colombia, Chile and Argentina.
