They were worried that the enemys would invade them next.
Sand dunes are formed by wind.
Explanation: Dunes form when wind blows sand into a sheltered area behind an obstacle.
I believe the answer is A but i could be wrong, during the Civil war it made it easier for them to speak and talk to each other during that time sending goods and messages across the united states.
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The Vietnam and Korea war, is because of people being unfair. In a more detailed explanation, it is happening because of people moving to the U.S. and so there are many spies for different countries inside of the U.S. That's how all of the camps had gotten started in the first place. And the U.S is very involved during this whole war too.
The Ordinance of 1785 put the 1784 resolution in operation by providing a mechanism for selling and settling the land, while the Northwest Ordinance of 1787 addressed political needs. The 1785 ordinance laid the foundations of land policy until passage of the Homestead Act in 1862.
so the answer is b
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