Which of the following events is an example of arbitration?

NATO passes a resolution against Iran.
NATO passes a resolution against Iran.

The United States sets up a meeting between Taiwan and China.
The United States sets up a meeting between Taiwan and China.

After hearing both sides, the United Nations decides to end the Russian occupation of Crimea.
After hearing both sides, the United Nations decides to end the Russian occupation of Crimea.

Opposing factions in the Second Congo War meet at the neutral African Union headquarters.

Opposing factions in the Second Congo War meet at the neutral African Union headquarters.

Opposing factions in the Second Congo War meet at the neutral African Union headquarters is an example of arbitration.

The event that is an example of arbitration is: Opposing factions in the Second Congo War meet at the neutral African Union headquarters.

Arbitration refers to the process of resolving a dispute or conflict between two or more parties through a neutral third party. In this case, the neutral African Union headquarters acts as the mediator or arbitrator between the opposing factions in the Second Congo War. By hosting the meeting, the African Union provides a neutral ground for the parties to discuss and negotiate a resolution to their conflict.

To determine which event is an example of arbitration, we need to understand the nature of each event and identify the presence of a neutral third party facilitating the resolution of a dispute. In the first event, NATO passing a resolution against Iran does not involve a neutral third party acting as an arbitrator. It is a collective decision taken by the member countries of NATO.

In the second event, the United States setting up a meeting between Taiwan and China does not necessarily involve arbitration either. While the United States may facilitate the meeting, it does not necessarily act as a neutral third party in mediating a dispute between Taiwan and China.

In the third event, the United Nations deciding to end the Russian occupation of Crimea demonstrates a decision-making process but does not necessarily involve arbitration. The United Nations is an international organization responsible for maintaining peace and security, and its decision to end the Russian occupation of Crimea is based on its own assessment of the situation and international law.

Therefore, the fourth event, where opposing factions in the Second Congo War meet at the neutral African Union headquarters, is the example of arbitration among the given options.