Answer:
Now western settlers were spurred onward by the development of the transcontinental railroad, a major by product of the period of industrialization that had begun in earnest. The expansion and immigration of the late 1800s merged with this industrialization to provoke the growth of American urban society.
Better technology has allowed farmers to feed more people and requires fewer people to work on farms to feed their families. Changes in equipment have made a large impact on the way farmers are able to farm and grow food. In the past, farmers would have to do field work by hand or with horse-drawn equipment.