Correct Answer: Coronation

Solution : The correct choice is the fourth option.

Explanation: "Coronation" is the precise term that encapsulates this ceremonial event. It is a noun that refers to the formal crowning or investiture of a monarch. The other options are not related to the specific ceremonial act described.

So, the correct sentence would be: "The royal ceremony concluded with the coronation of the new king."

The meanings of the other options are as follows:

1. Corroboration: Corroboration refers to the act of confirming or supporting a statement or theory with additional evidence. It is not related to the ceremonial act of crowning a monarch.
2. Unseating: Unseating refers to the removal or displacement of a person from a position or office. It does not capture the specific act of placing a crown on the head of a new king or queen.
3. Ousting: Ousting refers to the forceful removal or expulsion of someone from a position of power. It does not convey the ceremonial and formal nature of a royal coronation.