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Answer: 1.The Underground Railroad was a network of people, African American as well as white, offering shelter and aid to escaped slaves from the South. It developed as a convergence of several different clandestine efforts.
2.The settlement of the Americas is widely accepted to have begun when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum.
3.By the 1500s, the first Europeans, led by the Spanish and French, had begun establishing settlements in what would become the United States. In 1607, the English founded their first permanent settlement in present-day America at Jamestown in the Virginia Colony.
4.Industrialisation is the period of social and economic change that transforms a human group from an agrarian society into an industrial society. This involves an extensive re-organisation of an economy for the purpose of manufacturing.
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