Fact 1: The movement of tectonic plates causes volcanic eruptions.

Fact 2: The San Andreas is a "transform fault" that marks the boundary between two tectonic plates --  the North American and the Pacific.

Given the two facts above, answer the question "What causes volcanic eruptions?" with the following options: 
- a hemisphere is tilted away from the sun
 - high-mass stars collapsing
 - tectonic plates being pushed together
 - Two things found in Florida
 - Two things that come together in San Andreas
 - Two things found in Washington DC
 - Sudden shaking of the ground.
 - Two things found in Manhattan


 

     Two things that come together in San Andreas    