Respuesta :
It is definitely 2
Pulling factor defined as the factors that attract migrant. During 1845, where industrial revolution take off. It doubles the population. There is a high supplies of labor force but not enough industrial jobs. Therefore people migrate into US
Pulling factor defined as the factors that attract migrant. During 1845, where industrial revolution take off. It doubles the population. There is a high supplies of labor force but not enough industrial jobs. Therefore people migrate into US