Columbia (or the United States)'s largest export to the rest of the world is engine parts, car parts, and automobiles. Oil and uranium come from countries like Iran, Iraq, Saudi Arabia and Canada. Corn comes primarily from countries like Belize, Guatemala, and Honduras. The answer to your question is automobiles.
Its straight forward , it's the Organisation of Petroleum Exporting Countries and has nothing to do with it been a consolidate of Arab nations even though their land is dotted with oil.
