Respuesta :
B Because during this time factories were being built,so they could start making factories.Think about your northern states they needed steel from the factories so they could make steel to build skyscrapers.
One big impact of the population migration seen in the Industrial Revolution was B. Growth in cities.
Population migration in the Industrial Revolution
There was a mass exodus of people from rural to urban areas as they hoped to get better paying jobs in factories and businesses.
This led to cities growing to unprecedented heights to admit these people and to provide services such as housing and employment for them.
In conclusion, option B is correct.
Find out more on the industrial revolution at https://brainly.com/question/972061.