when mantle plumes (or hot spots) erupt underneath moving plates, which geologic feature results?\n…

Brief Explanations:

Mantle plumes (hot spots) erupting beneath moving tectonic plates cause magma to rise to the surface. Over time, repeated eruptions build up layers of lava and volcanic material above sea - level, forming volcanic islands. Trenches are formed at convergent plate boundaries where one plate subducts under another. Divergent zones are areas where plates move apart, typically associated with mid - ocean ridges. Earthquakes are mainly related to plate movements and stress release at plate boundaries, not directly to mantle plume eruptions under moving plates.

Answer:

C. volcanic islands