I think this is the answer ? Notify me if it’s wrong !//The AGE OF INDUSTRY brought tremendous change to America. Perhaps the single greatest impact of industrialization on the growing nation was urbanization. THOMAS JEFFERSON had once idealized America as a land of small, independent farmers who became educated enough to participate in a republic. That notion was forever a part of history. As large farms and improved technology displaced the small farmer, a new demand grew for labor in the American economy. Factories spread rapidly across the nation, but they did not spread evenly. Most were concentrated in urban areas, particularly in the Northeast, around the Great Lakes, and on the West Coast. And so the American workforce began to migrate from the countryside to the city.
The speed with which American cities expanded was shocking. About 1/6 of the American population lived in urban areas in 1860. URBAN was defined as population centers consisting of at least 8000 people, only a modest-sized town by modern standards. By 1900 that ratio grew to a third. In just 40 years the urban population increased four times, while the rural population doubled. In 1900, an American was twenty times more likely to move from the farm to the city than vice-versa. The 1920 census declared that for the first time, a majority of Americans lived in the city.