A short paragraph, explain how your economic system regulates choices to respond to economic challenges

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.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers

the border between arizona and new mexico is a thin, black line; this indicates a state boundary.

its correct: it's a thin line, and it's a state boundary, correct