One item that was never traded by native americans was ?

The social contact theory states that

The graph shows a demand curve. what does the data shown in this graph represent? a decrease in quantity demanded as prices decrease an increase in price as quantity demanded decreases a decrease in income as quantity demanded increases an increase in quantity demanded as prices decrease

How has mexico's culture been shaped by cooperation among different people? be sure to name the groups involved in the cooperation, describe the cooperation, and explain how the cooperation shaped mexico's culture