<span>Distribution of mineral deposits would be the answer since 'economy' deals with deposits as the rest of the answers deal with weathering and they don't include an economics. </span>
<h2>Answer: Oil </h2>
Oil is the main resource that Persia (Iran) has and until 2006 it was estimated that it was the fourth largest producer of oil in the world.
Taking into account that the world is still very dependent on this fossil fuel, it makes this resource of great importance for this region in its relationship with neighboring countries.