The food sources of Native Americans of the North and Northwest differed from that of Natives that lived in the West and Southwest due to the impact of climate which determined the types of food that were available. People in the North and Northwest did not farm. Irrigation allowed the people in the west to farm in dry areas.
The Civil Rights Act ended discrimination/segregation in employment, promotions, firing, voter registration, usage of federal funds, and public places based on race or sex.
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Love, Romance, Heartbreak and hound dogs.
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The answer is D. expensive wars with neighboring tribes.