Where in south america are the most active volcanoes located?

Most of the active volcanoes are located on whats known as The Ring of Fire and are found on its western edge, from the Kamchatka Peninsula in Russia, through the islands of Japan and Southeast Asia, to New Zealand.  

In the western part of south america that is to say from the stretch of the southern tip to the northern part ...

The second one is the answer edg.

Answerland;