There were many of them. Spain was divided from the English colonies with the desert in the south west region. There were also mountains in the west as well as in the east and north. lakes and forests also separated northern colonies from others. The Caribbean separated the middle part in case anyone wanted to go from one continent to the other by sea.
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No the Milky Way galaxy has not merged with any other galaxy
Essentially yes (the answer is "TRUE"), It was split into West Germany, a free democratic state and later a member of NATO, and East Germany, a state essentially controlled by the Soviet union and a member of the USSR (Union of Soviet Socialist Republics).
The answers a and d would be the correct answers to this question