In a brief paragraph, outline the ways in which OPEC is a trade barrier? PLEASE HELP THIS IS URGENT

OPEC can be observed as a trade barrier because it could hypothetically completely exclude a country from trading with countries that produce oil and this would make life much harder for those countries. For example, OPEC introduced an embargo on the US in 70s and there was a huge spike in gas prices and a shortage of fuel.

Explanation:

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.