Final answer:
Trade and exchange networks during the Hopewell period were extensive, involving goods from Yellowstone and upper Michigan.
Step-by-step explanation:
The best sentence that characterizes trade and exchange networks during the Hopewell period is: They were very extensive and included obsidian from Yellowstone and copper from upper Michigan.
During the Hopewell period, trade and exchange networks stretched over long distances, covering regions such as Yellowstone and upper Michigan. This is evidenced by the use of obsidian from Yellowstone and copper from upper Michigan in different settlements.
These networks were key to the Hopewell society's access to valuable resources and goods, highlighting their complex interactions and active participation in long-distance trade.
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