why is the pacific ocean said to be surronded by a 'ring of fire'?

because of all the volcanoes round it

there are active volcanos all the way around it.

Because of the volcanic rim. It is called the ring of fire because it's literally a "ring of fire" of volcanos.

volcanoes and earthquakes.

because of the heat symbolized by the surrounding countries

th ring of volcanoes under the pacific ocean its crazy stuff

volcanoes along it's rim all the way around

Lots of volcanic activity under the surface of the ocean, like a ring of fire.

the vocanic actio surrounding its rim