How did the rivers of Mississippi affect the lives of First Nations people

They protected settlements from attack by outside tribes. They gave European traders easy access to native markets. They provided a source of food that contributed to population growth.

Mississippi was the primary transportation and trade route into and through the central part of the continent. People drank its water and sent their wastes downstream, as they continue to do today. People harvested the plants and animals that were abundant in the river valley.

Explanation:

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in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.