The ring of fire is

/in /by

The ring of fire is:

 a) the boundary of any minor tectonic plate on Earth

b) the boundary of any major tectonic plate on Earth

c) the boundary between several tectonic plates including the Pacific, Juan de Fuca, Cocos, Indian-Australian, Nazca, North American, and Philippine Plates

d) the boundary around any tectonic plate on Earth