Volcanoes form a ring of fire around plate boundaries in the pacific ocean. how might this provide evidence that the plates are moving?

This shows that the so called hot spots on the tectonic plates are moving along with the actual tectonic plate. Because volcanoes form on hot spots, the most chain of active and non active volcanoes proves that if the hot spots are moving, so are the tectonic plates.

Size and shape of continents

The answer is hilum.