Answer:
Im not really sure but trading has given people supplies to live. Like food,water, hunting weapons, etc
Explanation:
I know this isnt helpful
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The main factor that led to the development of the four major river valley civilizations was its closeness to rivers, which was a food source, its flooding allowed for fertile soil, allowed easy transportation and cities near them were easier to defend.
The fact that fewer people had to dedicate to the production of food allowed some of them to develop other activities, such as the construction of building and cities, metal working, trade and social organization. This led to a social division, the ones that worked and the ones that ruled, creating intricate systems of governments and religions that ideologically sustained those in power.
Answer:
During that time (WWII), Navajo Code and coders were an important necesity because they were people that helped with communication. Back then, Navajo coders were the only ones that knew this secret language and utilized it in order to inform others and their allies secretly.
Hope That Helped!
Explanation:
All three of these are true. That's why you can still find many of the islands inhabited by small groups of people that migrated there thanks to the Lapita technological advancements.
