Plate boundary convergence and the process of are responsible for the formation of the Andes Mountains-a linear mountain range that parallels the western coast of South America.

Subduction

Explanation:

Subduction is a process that occurs when two adjacent tectonic plates encounter, and one of the plates goes under the other, literally sinking below, in the mantle.

The Andes Mountains are young mountains still in formation (this is why they are very tall and steep). They are being formed by the subduction of the Nazca Plate below the South American plate.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

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