Explanation:

- Curator (Option 2) ?? Correct: A curator is responsible for managing and overseeing collections in a museum. They plan exhibitions, handle artifacts, and ensure the preservation of exhibits.

- Compere (Option 1): This person hosts or presents a program, especially on television or radio, or is the master of ceremonies at a live event. Not related to museums.

- Conservator (Option 3): This is someone who works to preserve and restore artworks or artifacts. They focus on the physical care but may not manage entire collections.

- Commissioner (Option 4): A commissioner is generally a person appointed to a role of authority or regulation in a specific field, not related to museum activities.

In summary, a curator directly fits the role of a museum keeper.