Answer:
Oil
Step-by-step explanation:
The Middle East region is most famously known for its oil, which is traded internationally.
The Middle East is a region that goes from Egypt (West) to Iran (East) and from Turkey (North) to Yemen (South).
That region hold a large part of the world's reserves of oil and is mostly controlled by Royal families in non-democratic systems.
The oil made those countries extremely rich, since the other countries are buying this oil at a good price.