The correct pairing that matches an organization with its function is:
African Union: resolve conflicts in sub-Saharan Africa
The African Union's primary objective is to promote peace, security, and stability on the continent, making this pairing accurate.
The other pairings contain inaccuracies:
- The Commonwealth primarily focuses on fostering cooperation among member states, not specifically promoting economic advancement in Asia.
- The Warsaw Pact was a military alliance that was more focused on collective defense among member states rather than solely preventing the spread of communism.
- The European Union does have a role in resolving disputes, but its primary functions are broader, encompassing economic integration and cooperation among member states.
- COMECON was intended to promote economic cooperation among Eastern Bloc countries, not just trade.
Thus, African Union: resolve conflicts in sub-Saharan Africa is the correct choice.