Seismic activity in the ring of fire is caused by the movement of what

Pacific plate.

Explanation:

If you look at a map of the tectonic plates the ring of fire outlines the pacific plate. The pacific plate always activity moves and shakes cause a lot of seismic activity around the ring of fire.

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.