What services did settlement houses provide

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 neighbours.

the correct labels are as follows:

a: yellow river

b: himalayan mountains

c: north china plain

d: taklimakan desert

answer; ///(c) i believe that the correct answer is ethnic relations bear many similarities across different global; good luck