How did the Supreme Court’s decision in the Plessy v. Ferguson affect the United States?

Explanation:

Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brow

i would think it's industries and hydroelectric power

the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.