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Answer:
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.
The Columbian Exchange was the widespread transfer of plants, animals, culture, human populations, technology, and ideas