Answer: They were surrounded by an abundant food supply.
Step-by-step explanation: Following factors allowed Coast Indians to establish permanent communities. These North American Indian tribes from the Pacific were able to settle in an area where the climate permitted them to grow some crops, it wasn't as cold or hot as it was in the East, and they had the huge advantage of being close to the harbor for the Pacific, which allowed them to take advantage of the sea. They were skilled fishermen who always had a supply of fruits, vegetables, shellfish, clams, salmon, and other seafood for their families.