Final answer:
The Northwest coastal region was culturally rich and densely populated due to abundant natural resources, with fishing playing a significant role in the lives of Native American groups like the Tlingit and Haida.
Explanation:
The Northwest coastal region was culturally rich and densely populated due to abundant natural resources, leading to large, permanent towns forming the basis of the political structure for many Native American groups such as the Tlingit and Haida. This area was unique environmentally and culturally, with Native peoples relying heavily on fishing for food.
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