Oil is one of Saudi Arabia's major exports.
OKAY SO, do you have any more info?
In geology subduction is the process whereby one tectonic plate is forced underneath another tectonic plate along a convergent boundary. Places where this type of plate interaction occurs are called subduction zones. Subduction zones have a high rate of volcanism, earthquakes, and mountain building.
The answer would be transform boundaries where crust is neither created or destroyed and an example is movement on the San Andreas Fault which is primarily lateral movement on or close to the surface and no melting of rock is involved.