Final answer:
Hot spot volcanism can occur under both oceanic and continental crust, which is true. Oceanic hotspots tend to produce basalts, while continental hotspots can lead to bimodal volcanism with basalts and rhyolites.
Step-by-step explanation:
The statement that hot spot volcanism may occur on both oceanic and continental crust is true. Hotspots are regions of the Earth's mantle that are much hotter than their surroundings, which can lead to melting and the eventual rise of magma to the surface, forming volcanoes.
When a hotspot is located beneath oceanic crust, it often produces basalts, which are evident in the formation of island chains such as the Hawaiian Islands. If a hotspot is beneath continental crust, it can produce a broader range of volcanic rocks, including basalts and rhyolites, in a process known as bimodal volcanism.