The region where indigenous people formed a complex system of government and lived in forests was the NorthEast.
The Natives in this part of the world, lived in forest-rich environments that had an abundance of natural resources.
They also developed a complex system of government when five nations came together to form the Iroquois Confederacy.
Find out more on Natives in the Northeast at https://brainly.com/question/18016273.
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