Check out Code of Federal Regulations/49/chapter 1/Part 172.
Answer:
The most important characteristic for the development of a civilization is the presence of advanced cities because they were centers of trade, which established economies and allowed for further development of the civilizations.
Explanation:
A civilization is often defined as a complex culture with five characteristics: (1) advanced cities,. (2) specialized workers, (3) complex institutions, (4) ...
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yes there are written records of the first migration of humans to the americas
so thats true
