People didn't have to move anymore like nomads, they could settle down and grow crops near river valleys. This enabled them to grow surpluses that could be traded with other civilizations. This meant that the amount of wealth grew and individuals started becoming richer than the others, leading in them becoming important in the society and developing political systems.
Answer: Appomattox matched with General Robert E Lee surrendered to General Ulysses S. Grant
Manassas matched with First battle with heavy casualties
Gettysburg matched with Turned the tide of the war in the North's favor.
Fort Sumter matched with Where the Civil War began
Explanation:
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B) neutral, because he is just stating what reports have said.
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D. The region lies on the border of two tectonic plates