Australia is the only continent with no active volcanoes. While it has many extinct volcanic peaks and evidence of ancient volcanic activity (like the Great Dividing Range), it lacks current eruptions because it sits in the middle of a tectonic plate, far from active plate boundaries. ANSWER: (C) Australia
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Tectonic activity usually occurs at the edges of plates. Australia is situated in the center of the Indo-Australian plate, making it geologically stable. Unlike Africa (Rift Valley), Europe (Etna/Vesuvius) or Antarctica (Mount Erebus), Australia has no subduction zones or active rifts to generate fresh magma. The last volcanic eruption on the Australian mainland occurred at Mount Schank and Mount Gambier about 5,000 years ago. Today, the continent is considered a “volcanic desert,” though it still experiences minor intraplate earthquakes due to internal stresses within the crust.