300
Ok multipale choice!!!!!
the theory of tectonic plates explains what?
a.the extinction of dinosaurs.
b.the symbotic relashionship between tapeworms&bacteria.
c.the number of plates needed to serve dinner to everyone on the research ship.
d.the movement of contintents and the occurrence of volcanos and earthquakes.
Do i have to tell you the anwser ok i will its D!