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Answer:
Trade Routes. Mesopotamia's rivers and location in central Asia supported extensive trade routes. ... This allowed Mesopotamia to access resources not native to its region, like timber and precious metals. In turn, Mesopotamia developed key aspects of civilization, like a token system to keep trading records
Trace fossil since a trace fossil are fossilized nests, gastroliths, burrows, footprints, etc.
Alfred Wegener found this out through the Continental Drift Theory.
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