They both are caused by quakes in the bottom of the ocean or moves in tectonic plates, so they are caused by giant forces moving other giant land masses.
Earthquakes are when the tectonic plates hit each other and volcanic eruptions are when the plates push up against each other and release the magma below the estates crust
The central nervous system is better protected than any other system or organ in the body. Its main line of defense is the bones of the skull and spinal column, which create a hard physical barrier to injury.
