It is continent cause there is no term for many continents because continent is the biggest landmass.
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The countries in the Middle East that export petroleum are Saudi Arabia, Iran, Iraq, United Arab Emirates, Kuwait, Qatar, Oman, and I think there are a few more but those are the main ones. Lots of Middle Eastern countries export it but these are the main ones. Places like Saudi Arabia and Iran have lots of oil fields available, so they would naturally export lots of petroleum.
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The Gulf of Mexico. It technically also borders the states of Louisiana, Texas, Mississippi, Alabama, and Florida, as well as Mexico and Cuba