Final answer:
Volcanoes located at hotspots arise from heat sources deep within the Earth's mantle, such as those fueling the Hawaiian Islands and the calderas at Yellowstone and Anahim hotspots in North America.
Step-by-step explanation:
Volcanoes located at hotspots are areas where molten rock rises to the Earth's surface independent of tectonic plate boundaries. One of the most renowned hotspots is beneath the Hawaiian Islands, fueling the three active volcanoes on Hawaii. The hotspot has been active for over 100 million years, producing a long chain of volcanic islands as the Pacific Plate moves overhead.
In North America, hotspot activity is evident with the Yellowstone hotspot underneath Yellowstone National Park and the Anahim hotspot in central British Columbia, Canada. The volcanic tracks of these hotspots are observed as chains of volcanic areas each with a specific age of initial volcanism. Caldera formations mark these hotspots, with the Yellowstone hotspot being part of historical supereruptions.