Which mountain range runs down the western edge of south america and serves as the eastern border of chile?

The Andes

Explanation: The Andes is also called Andes Mountains, and it is a mountain system of South America that consist of a huge number of extremely high plateaus, which are surmounted by even higher peaks that form an unbroken ridge over a distance of some 5,500 miles. This ridge extends from the southern tip of South America to the continent’s northernmost coast on the Caribbean.

answer called a epicycle;

hi there!

the answer you are looking for is relatively steep.

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