Final answer:
Mid-ocean ridges form at divergent plate boundaries, creating a line of volcanoes on the ocean floor.
Explanation:
Mid-ocean ridges are formed at divergent plate boundaries where oceanic plates separate, leading to the creation of an enormous line of volcanoes along the ocean floor. This process involves magma being generated by partial melting of the mantle as the oceanic lithosphere diverges, resulting in the formation of the ridge.
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