Answer: Small, localized communities of the Pacific Northwest specialized in a single, dominant economic activity and traded with one another for access to a variety of goods.
Step-by-step explanation:
From the map we can see that in the Pacific Northwest the dominant economic activities were Agriculture and Fishing.
Judging by the location of the different groups firmly in one economic area, we can infer that they were small localized communities that specialized in a single, dominant economic activity.
The Paiute for instance specialized in Agriculture while the Pomo specialized in fishing. They then probably traded amongst themselves to have access to a variety of goods.