Answer:
cerrado
Step-by-step explanation:
Desafortunadamente, el museo de arte precolombino está cerrado todo el día.
Translation
Unfortunately, the pre-Columbian art museum is closed all day.
The verb "close" (infinitive) conjugated in the past participle is used. This tense has different uses. In this case it forms passive sentences. There is agreement between past participle and patient subject. There is also agreement between subject and being followed by past participle. These sentences make passive sense.