Final answer:
OPEC countries control more than 80% of the world's proven oil reserves.
Step-by-step explanation:
The Organization of Petroleum Exporting Countries (OPEC) controls more than 80% of the world's proven oil reserves. OPEC is a consortium of oil-producing countries that aim to maximize profits related to oil exports. Most of its members are located in the Middle East, including Saudi Arabia, Iran, Iraq, UAE, and Kuwait.