I think ither silt or dust
Civilizations born along rivers By roughly 6000 to 8000 years ago, agriculture was well under way in several regions including Ancient Egypt, around the Nile River; the Indus Valley civilization; Mesopotamia, between the Tigris and Euphrates rivers; and Ancient China, along the Yellow and Yangtze rivers. This is because the regular river floods made for fertile soil around the banks and the rivers could also supply fresh water to irrigate crops. It’s no coincidence that as agriculture allowed for denser and denser populations along with more specialized societies, some of the world’s first civilizations developed in these areas as well.
Answer:
it’s
a.) they built an observatory
Explanation:
just took the test and got 100
Answer:
Andrew Jackson's presence in Florida. This treaty, signed in 1819, settled all border disputes between Spain and the US. Spain gave east Florida to the US, and the US gave up its claims to what is now Texas.
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Susan B anthony they both wanted the same thing but yet were not the same group
