What type of group is the Organization of Petroleum Exporting Countries (OPEC), where members collaborate to control production levels and set prices?

Explanation

OPEC functions as a cartel, which is an association of producers who coordinate to regulate supply and influence prices. Unlike a monopoly, which is controlled by a single entity, a cartel involves multiple members working together. Entropy relates to disorder, and industry or consortium do not specifically imply price and output control.