Answer:
Delta, Forest, Plateau, Stream
Explanation:
Denver is the capitol of Colorado and is a defined region that was man-made, Georgia is a state in the South-Eastern United States and is a defined region that was drawn by humans, North America is a region that was defined and only looked at by humans. Deltas, Forests, Plateaus, and Streams can change at a given notice due to natural changes like flooding and erosion and therefor are Natural Regions
