The mountain range that borders the **Pacific Ocean** and includes countries like **Chile**, **Peru**, and **Ecuador** is the **Andes**. This range is notable for its diverse ecosystems, varying from arid deserts to lush rainforests. The Andes also influence regional climates, precipitation patterns, and agriculture, making them central to the life of communities across South America. They contain numerous volcanoes, some of which are active and play a major role in the geological dynamics of the region.