What is OPEC role managing world resources ​

OPEC aims to regulate the supply of oil in order to set the price on the world market. The arrival of fracking technology for natural gas in the U.S. has reduced OPEC's ability to control the world market. The organization was established in 1960 by its founding members Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela.

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answer; i believe the correct answer is (the willamete valley);

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain