Answer:
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Explanation:
1. Subsequent eras of history follow one another precisely with little overlap trends.
the Great Migration Begins
When World War I broke out in Europe in 1914, industrialized urban areas in the North, Midwest and West faced a shortage of industrial laborers, as the war put an end to the steady tide of European immigration to the United States.
An economic and political benefit was that it was easier to create new settlement now that railroads and machinery was everywhere. New settlements meant new settlers and this meant new colonies with political power. This meant that the people would be working to improve them and pay taxes and thus the country's wealth would grow because of production.