Which of the following is a principal organ of the UN responsible for coordinating international cooperation on economic and social issues?

The Economic and Social Council (ECOSOC) is indeed the principal organ of the United Nations tasked with coordinating international cooperation on economic, social, and related issues. It plays a crucial role in promoting higher standards of living, full employment, and economic and social progress. ECOSOC facilitates discussions among member states and links them with specialized agencies, such as the World Health Organization and the United Nations Educational, Scientific and Cultural Organization, to enhance the efficacy of international development initiatives. Its mandate also includes fostering partnerships with non-governmental organizations and the private sector, thereby expanding its reach and improving the effectiveness of its engagements.

The other choices do serve important roles within the UN system, but their functions differ significantly from those of the Economic and Social Council. For instance, the Security Council focuses primarily on issues related to international peace and security, while the General Assembly operates as a deliberative assembly for all member states to discuss a wide array of international issues but lacks the direct coordinating role that ECOSOC has on economic and social matters. The Trusteeship Council was established to oversee the administration of trust territories but has largely become inactive following the independence of these territories. Thus, the Economic and Social Council's specific focus and functions distinctly align it with coordinating international cooperation on