Answer:
Where the two plates meet, the denser oceanic lithosphere of the Nazca Plate is forced down and under the more buoyant continental lithosphere of the South American Plate, descending at an angle into the mantle in a process called subduction.
The Andes are a Mesozoic–Tertiary orogenic belt of mountains along the Pacific Ring of Fire, a zone of volcanic activity that encompasses the Pacific Rim of the Americas as well as the Asia-Pacific region.
The Andes were formed by tectonic activity, whereby earth is uplifted as one plate (oceanic crust) subducts under another plate (continental crust).
A North South trench, evidence of volcanism and earthquakes.
Step-by-step explanation: