Final answer:
Active volcanoes are positioned above magma chambers where molten rock accumulates below Earth's surface, ultimately leading to volcanic eruptions.
Explanation:
Active volcanoes are situated above a magma chamber, where molten rock accumulates beneath the Earth's surface. This magma rises buoyantly and erupts onto the volcano's surface, creating layers of lava. Hot spots, located at plate boundaries or intraplate areas, are regions where volcanoes form due to rising magma and mantle plumes.
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