The photograph above shows mountains in the andes range in south america.
which statement describes the geologic process that is most likely responsible for the formation of these mountains?
a) they are along a transform plate boundary that is no longer active, so erosion is creating deep valleys.
b) they are along a transform plate boundary in which plates are currently moving side by side, causing earthquakes and faults.
c) they are along a plate boundary in which plates are currently converging, causing uplift and steep slopes.
d) they are along a plate boundary in which plates diverged in the distant past, allowing new rock to build up.

C) They are along a plate boundary in which plates are currently converging, causing uplift and steep slopes.

Explanation:

The Andean Mountain Range is by far the longest and highest mountain range in South America, and one of the largest in the world as well. Its formation is due to the convergent plate boundary between the South American plate and the Nazca plate. The Nazca plate is an oceanic plate, while the South American plate is a continental plate. The Nazca plate subducts bellow the South American plate, causing uplift in the area near the subduction zone. This has resulted in lifting up of the land, slowly creating the steep and very high Andes. The plate boundary is still active in the same way, so the process still continues.