Answer:
The reason the author wrote the selection is c. to describe the Andes Mountains .
Step-by-step explanation:
The given passage contains a description of the Andes Mountains of South America. It details its location, which ranges from "the top of South America and go along the coast to the bottom of South America".
This mountain range that "spans over 400 miles" also has "lots of volcanoes" that are active and pose a hazard to the people living near and around it. Moreover, it also is in an earthquake zone like California and has led to the deaths of many people.
The reason the author wrote this selection/ passage is to inform the readers about Andes Mountain and give a description of it.
Thus, the correct answer is option c.