This natural resource supports the economy of many nations in the region. diamonds oil salt soil

Oil resource.

Explanation:

Most of the middle eastern nations n the world are supported by the oil and the natural gas and these are resources that help the nations such as the Arabian Gulf countries that are rich in its resources and oi resource is also found inland of the south Americas  Venezuela and the Colombia and they are other African countries at are rich in the resource as niger, Algeria and the other Russian countries of the world.

Answer (d) the greenhouse effect is primarily caused by car and trucks;