What happens at the Pacific Ring of Fire which circles the Pacific Ocean from the west coast of North and South America to the east coast of Asia?

It produces volcanoes as a result of tectonic plate movement

Explanation: The way the plate tectonics move create the volcanoes due to the direction they're moving which allows the magma/lava to flow making it a "volcano"

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement

answerinternational border(ib);