1. Save
2. Water
3. Save
4. Future
It should be the third answer choice. The nations of OPEC chose to cooperate primarily in order to manage the supply of a natural resource.
OPEC works to balance both the production and price of oil so that customers are able to receive a consistent supply of petroleum and investors in the industry are able to make profit from their investments.
Usually determined by changes in the biota.
Veinte, that is 20 in spanish
