Respuesta :
Immigration from Europe and the eastern states led to the rapid growth of the West, based on farming, ranching and mining.
Labor unions became important in the very rapidly growing industrial cities.
Labor unions became important in the very rapidly growing industrial cities.
Answer:
Many people moved from rural areas to cities in search of jobs.
Immigrants came to the United States, and most settled in cities.
Businesses located their factories and corporate headquarters in cities.
Rail lines made transportation to and from cities easier.
Explanation: