Final answer:
The key source of existence for the Plains Indians was the buffalo. They relied on the buffalo for food, clothing, tools, and shelter.
Step-by-step explanation:
Key Source of Existence for the Plains Indians
The key source of existence for the Plains Indians was the
buffalo. They relied on the buffalo for food, clothing, tools, and shelter. The buffalo provided them with meat for consumption, hides for clothing and shelter, bones for tools, and sinews for sewing and crafting. The Plains Indians had a deep cultural and spiritual connection with the buffalo, and its abundance on the plains allowed their nomadic lifestyle to thrive.
Learn more about Plains Indians and their reliance on buffalo