Option: b. Feed basaltic volcanoes (composition similar to the seafloor), unless the hot spot is altered in composition coming through a continent, in which case the volcano may be more andesitic.
Explanation:
Most volcanoes found in the plates boundaries but some situated in the centre of the plates. These volcanoes formed over a hot spot where mantle plume is rising in the form of magma. Hot spots are found in the ocean, and on continents.
Hot spot volcanoes occur far from plate boundaries because mantle plumes exist below the tectonic plates. Volcanoes in the Hawaiian Islands and Yellowstone National Park are some of the examples of the Hot spots.
