What section of the country saw the growth of industries in businesses in the early 1900s

North

Explanation:

The American Civil War changed the country deeply, hand labor was replaced by machines and the railroads increased the capacity of the industry. The North led the way in industrialization, especially because the Southern States were destroyed by the Civil War. Industries expanded and cities became the center for labor and jobs, people left the land to work in factories on the big cities.

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