Which resources are important to the economies of many countries in siberian russia, central asia, and the caucasus region? a. oil b. timber c. diamonds d. coal

I think it's a)oil because it bring wealth into the region they are needed for much of the world's economy. ... Over half of the world's known oil reserves are found in this part of the world

Bwould be my guess |-/ 

Answerseafloor spreading;