Two factors that result in a volcano at a plate boundary are..

I don't get what this question is asking.

3 answers

It's asking what is a volcano? Why is it located at a plate boundary?

http://www.geology.sdsu.edu/how_volcanoes_work/Volcano_tectonic.html
I don't know, I still don't get it, the question is confusing.
Think about heat within the earth that can escape at the boundaries of plates.