Final answer:
Swedes and Germans were two groups that settled in the cities during the era of urbanization in the United States.
Step-by-step explanation:
During the era of urbanization in the United States, two groups that settled in the cities were Swedes and Germans. These immigrants formed ethnic communities within the cities, maintaining their organizations based on their culture and religion. They were part of the larger wave of immigrants from various European countries who settled in neighborhoods with people from the same region, creating diverse cultural enclaves.