Often, the conditions that children and workers worked in were unsafe and they worked long hours with no rest. they worked all day. sometimes they would get stuck in machinery and get hurt or even die. also, working in factories caused health problems for many children and workers.
The correct answer is - pull factors.
The increased freedom and much more employment opportunities in the United States can be considered as pull factors. They can be considered as pull factors because they are big reasons why people from all around the world got attracted to the idea of migrating to the United States, as they saw a nice chance to prosper and have a better life. Most of the countries were still struggling with the freedom issues, and the employment opportunities were either very limited, or badly payed, so no wonder that pople wanted to move in the United States.
Could you add a little more context please?
North Korea I think hope this helps
