Concept:The United Nations Organization and its agencies support many development projects in Ghana.
Explanation:The AU, ECOWAS, and the Commonwealth are mainly political, regional, or cooperative bodies, not major financiers of Ghana's development projects.
The United Nations Organization provides financial and technical support through agencies like UNDP, UNICEF, WHO, and others.
Therefore, among the options, the UN is the largest financial contributor to Ghana's developmental projects.
Answer:D. United Nations Organization