What was a benefit of living in ghettos for immigrants?

The correct answer is that the ghettos were ethnic neighborhood that provided familiarity. This means that the people were surrounded by other people of their culture and they could practice their culture or their religion how they saw fit without having others mess with it or meddle with it.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.