International law encompasses a variety of fields and functions. From your list, the following are functions of international law:
- Outer Space - Regulates activities related to the exploration and use of outer space, ensuring peaceful cooperation among nations.
- Rights of Refugees - Protects the rights of individuals who flee their home countries due to persecution, conflict, or violence.
- World Trade - Governs international trade relations, ensuring fair and equitable trade practices among countries.
- Human Rights - Establishes standards for the protection and promotion of human rights globally.
All four options provided (Outer Space, Rights of Refugees, World Trade, Human Rights) are indeed functions of international law.