In which one of the following countries is the volcano ‘Guallatiri’ located ?

Guallatiri is an active stratovolcano located in the Arica y Parinacota Region of northern Chile [1]. Standing at an elevation of approximately 6,071 meters, it is situated within the Central Volcanic Zone (CVZ) of the Andes mountain range [1]. The volcano lies very close to the border between Chile and Bolivia, specifically west of the border line, but is entirely contained within Chilean territory. It is characterized as a symmetrical, ice-clad composite volcano and is considered one of the most active volcanic centers in northern Chile, featuring persistent fumarolic activity and gas emissions. The Andes range itself, where Guallatiri is located, was formed by the subduction of the Nazca Plate beneath the South American Plate, a process that continues to drive active volcanism in the region.

Sources

1. [1] https://www.sciencedirect.com/science/article/pii/S0895981120306593