1：United Nations Office for the Coordination of Humanitarian Affairs (OCHA): This is the responsibility of the United Nations to coordinate global humanitarian efforts

2：A charity aid organization. It provides information, policy recommendations, advocacy, and funding to support people affected by conflicts and natural disasters.

3：The Office of the United Nations High Commissioner for Refugees (UNHCR) focuses on protecting refugees and asylum seekers, providing them with assistance and durable solutions.

4：The United Nations Children's Fund (UNICEF) is committed to improving the living conditions of children, especially in emergency situations. It provides nutrition, healthcare, education, and other basic services.

World Food Programme (WFP): Providing food aid to people who are hungry and in crisis, while supporting developing countries in achieving food self-sufficiency.

5：The World Health Organization (WHO) provides medical assistance in emergency situations, supports health systems, and helps prevent and control disease outbreaks.

6：United Nations Disaster Assessment and Coordination (UNDP): This is a team composed of United Nations agencies responsible for assessing needs immediately after a disaster occurs and coordinating international rescue efforts.

7：Central Emergency Response Fund (CERF): This is a funding pool of the United Nations used to quickly provide humanitarian assistance in the event of natural disasters and conflicts.