Hawaii is not located on a plate boundary. It is actually situated in the middle of the Pacific Plate, which is a tectonic plate that covers a significant portion of the Pacific Ocean. The Hawaiian Islands were formed by a hot spot, which is a plume of molten rock that rises from deep within the Earth, creating a chain of volcanic islands as the plate moves over it.
This hot spot activity has led to the formation of the Hawaiian Islands over millions of years, distinct from the tectonic processes associated with convergent, divergent, or transform boundaries. So, in conclusion, the correct answer is b) not on a plate boundary.