What region of the United States did Cliff Dwellers reside in?

people of the southwestern United States, built along the sides of or under the overhangs of cliffs, primarily in the Four Corners area, where the present states of Arizona, New Mexico, Colorado, and Utah meet.

Explanation:

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.