Answer:
Appalachian Mountain Range
Explanation:
The Appalachian Mountain Range runs through most of the Eastern United States, and had previously served as the border for the 13 colonies back in the colonial age.
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Cold air is correct answer
Answer:
Delta
Explanation:
Delta is a geographical term that describes the formation of wetlands. It is formed from the slow movement of water and deposit from a river into a larger water body. For example lake, sea and ocean. A vivid example is a place where the River Nile moves at a slower pace into the Mediterranean Sea.
Hence, in this case, as a river reaches its mouth it is often affected by incoming tides resulting in a formation called a DELTA.
