Pacific mountain system, series of mountain ranges that stretches along the Pacific Ocean coast of North America from northern British Columbia (Canada) to northwestern Mexico. They run for some 4,500 miles (7,250 km) in the United States and extend northward into Canada for another 1,000 miles (1,600 km).
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Explanation:
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Answer:
answer is B.
Explanation:
it shows that harappa could store excess food to save,sell or trade with others.
