Which group relied on the buffalo as an important food and material source? plains indians
northwest coast indians
eastern woodland indians
mound builders

Plains Indians

Explanation:

The Native Americans were divided into different groups, and they had developed different cultures and lifestyles. The main reason behind this were the living conditions, mainly the geography, climate, latitude, available food sources. Some Native Americans engaged into agriculture, some were hunting small and medium sized animals and gathering plants, while some predominantly hunted. The Native Americans that were known as the Plains Indians were mostly dependent of hunting buffalo. The buffalo herds were abundant in the prairies, so naturally the Native Americans living in this region used the buffalo for everything they could. The buffalo provided food, but also material for clothing, making shelters, and making weapons, thus being essential part of the lives of these groups of people.