Question

Why were so many people moving from farms to cities

Answer 1

Industry grew with things such as steel mills, auto manufacturers, textile industries. A lot of people were searching for higher paying jobs and moved from the farm lands to the cities to fulfill employers seeking skilled and unskilled workers to build American made products on a huge scale.

To summaries, people in farms weren't getting payed enough so they moved to the city to get more jobs that were higher paying.