Answer:
the Andes is the primary mountain range in South America
The seismic wave can tell the scientists about the earth's layers.<span />
I wanna say D.
Sorry if I’m wrong:(
Explanation:
The St. Lawrence seaway helped because it was large enough to allow shipping transportation to the USA. Which allowed Canada and the USA to trade goods. The seaway extends from Montreal through the Welland Canal in Ontario, Canada, to the eastern portion of Lake Erie.
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