Concept:Fusion of ceremonial and executive functions occurs when the Head of State and the Head of Government are the same person.
Explanation:In every system of government, these two roles exist.
The ceremonial role represents the state at official functions.
The executive role involves running the government on a daily basis.
In a presidential system, the President performs both roles at once.
The President is both the ceremonial Head of State and the executive Head of Government.
This makes the presidential system the only one with complete fusion of these functions.
By contrast, in a cabinet system, the ceremonial Head of State is separate from the Prime Minister, who exercises executive powers.
Similarly, confederal and republican systems do not automatically combine these two roles.
Thus, the feature of fusion of ceremonial and executive powers is unique to the presidential system.
Answer:A. Presidential