Answer:
B: urbanization, because immigrants moved to areas with industries to find jobs, spurring the growth of cities .
This term completes the graphic organizer.
Explanation:
'Urbanisation' occurs when the people from rural area migrate to the cities in search of jobs. People were moving to cities as there was more work in the factories. People wanted good salaries and stability. So, farmers started settling in urban areas and worked in factories. This also led to industrialization and led to economic growth of the country.
Other options are incorrect as “Naturalization” is the process in which "U.S. citizenship" is granted to a foreign citizen when requirements of INA are fulfilled. And, if a union is formed in an industry, that company is said to be unionized.