Except for local wars quieted.
The migration patterns Homo sapiens took out of Africa during the Pleistocene. the impact of those migrations was that Humans, according to a large body of scientific opinion, were a major contributor to the demise of Pleistocene megafauna. This is further explained below.
<h3>What are migrations?</h3>
Generally, migration is simply defined as when creatures leave their "usual place of abode" and settle somewhere else, sometimes quite a distance away.
In conclusion, People changed the ecology and eventually became the top predators as they spread over the world
Read more about migrations
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Answer:
The population of United states will be low.
Explanation:
The railroads sought immigrants for its labor because labors are needed for the building of railroads. The immigrants labor were good for this work due to taking low wage for the work as compared to local workers who demanded more money for the work because the work is very hard. If these immigrants did not come for the work of railroads so the population of United States of America is lower than the present population of United States.
I think it was because a bad winter in Russia
