What was the quota system

that is what I know about quota system

Explanation:

quota systemis the concept of organising society by a quota system, whether by a racial ,gender language or another demographic attribute .

i think the answer is the one about environmental and social health.

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native americans suffered high rates of poverty and unemployment.

during the late 1960s and early 1970sthe need for political militancy grew among the native americans. throughout the 1960s, they had been the nation's poorest minority group, the most deprived group, according to practically every socioeconomic measure. in 1970, the indian unemployment rate was 10 times the national average, and 40 percent of the native american people were below the poverty line.