Final answer:
The Plains Native Americans relied on horses for travel and hunting. The Indian tribes of the Pacific Northwest built totem poles to display their culture. The Native American civilizations of the Mississippians migrated to the Rocky Mountains and built large cities.
Step-by-step explanation:
The group of nomadic nations that relied on the horse to travel and hunt were the Plains Native Americans. After the reintroduction of the horse to North America, the Plains groups quickly adopted the use of horses in following and hunting the great bison herds.
This transformed their lifestyle from farming to nomadic hunter-gatherers and had a significant impact on their culture and society.
The group of Indian peoples in the Northwest known for building totem poles and showing off their slaves and wealth were the tribes of the Pacific Northwest. They included tribes such as the Kwakiutl, Haida, and Tlingit. Totem poles were important cultural symbols and represented the identity, history, and social status of the tribes.
The group of nations that migrated to the Rocky Mountains, built large cities, and mounds used for burials were the Native American civilizations of the Mississippians. They built impressive cities and earthwork mounds as architectural feats, and they had a complex social and political structure.
The confederacy that allowed each group to have their own identity and laws but also allowed them to help each other during times of war was the Iroquois Confederacy.
The confederacy was formed by five Nations: the Mohawk, Oneida, Onondaga, Cayuga, and Seneca. Later, the Tuscarora Nation joined, making it six Nations. They worked together in a diplomatic and military alliance known as the League of the Iroquois.