There are a lot of earthquakes in South America because of the South American plate. This plate is a tectonic plate, so the near by plate(Nazca Plate) slips under the South American plate, which causes earthquakes.
The question is asking to choose among the following given choices that is not likely to appear on a map and in my further analysis and understanding, I would say that the answer would be the Horizon. I hope you are satisfied with my answer and feel free to ask for more if you have question and suggestion
Plate tectonics are important to geoloigists because they explain how the continents make up the earths crust.
