3. Which volcanic belt borders the western coasts of North America and South America?

The western coasts of North America and South America are part of the Ring of Fire volcanic belt.

Explanation:

The western coast of both North and South America is a highly tectonically active area. There are numerous volcanoes along the western coastlines of these two continents. They are actually part of the biggest volcanic belt on Earth, the Ring of Fire.

The Ring of Fire is a volcanic belt that roughly outlines the Pacific Ocean, thus it stretches along the eastern coasts of Australia and Asia, and the western coasts of North and South America. The reason why this volcanic belt is so massive and is located where it is is because of the numerous subduction zones. The Pacific, Phillipino, Sunda, and Nazca plates are subducting below the continental plates they are forming a convergent boundary with, like the Australian, Eurasian, North American, and South American plates.

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