Final answer:
A hot spot is a long-lived magma source in the mantle that creates shield volcanoes like the Hawaiian Islands.
Explanation:
A very long-lived magma source located deep in the mantle is called a hot spot. Hot spots are areas where upwelling of hot magma creates shield volcanoes, forming island chains like the Hawaiian Islands. These hot spots remain stationary while tectonic plates move over them, leaving a trail of volcanic islands.
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