Answer:
boomtowns
Explanation:
The term "boomtowns" is used to describe any city or development that pops up quickly around a rapidly-growing industry. This term is also used to describe the cities that appeared- and disappeared- quickly around gold mines in the west.
Both were huge into the business industry, Carnegie was a leader in the steel industry as well.
Do you have a passage or something to answer it easier?
It was difficult for Guild (medieval labor unions) members in the early 1800s because people would use workers outside the guild. Labor union increase in the late 1800's was primarily due to poor working conditions, unfair wages, inequality and lack of benefits. i hoped i helped <3