Final answer:
Canadian Heritage is the vertical constituency department as it caters to specific groups' cultural and identity interests within Canada. In contrast, the World Congress is not a primary organ of the United Nations.
Step-by-step explanation:
In the context of the Canadian government, a vertical constituency department typically serves a particular group of people in society, focused on specific interests or identity, such as an ethnic group, industry, or geographic region. Among the options provided, Canadian Heritage is a vertical constituency type of department. It is responsible for policies related to arts, culture, heritage, and identity of particular groups within Canada. In contrast, departments like Finance Canada serve horizontal constituencies as they provide services that affect the entire population. Regarding the United Nations, the primary organs are the Security Council, General Assembly, Economic and Social Council, International Court of Justice, Secretariat, and the Trusteeship Council. Therefore, the World Congress is not one of the primary organs of the United Nations.