While your sentence is grammatically correct, it is a completely different sentence. That would be " esta' cerrada".
Because "is closed" describes the state, while "closes" describes an action.
I think it ia correct answer. University cannot take an action and close itself. Somebody close the university.
Good point. However, expressions like "the movie starts at 7," "the store opens at 9," or "the office stays open late on Thursdays" are common --- at least in the US.
It's still grammatically correct to use the verb in this way. Common usage in both Spanish and English.
The 'correct answer' is trying to push a faulty in this task. It isn't closing in June, but is CLOSED or SHUT. Reported
If you mean "The university closes in June" (implying it is open in all other months), would you say "La universidad cierra por junio"?
Doesn't fit the sentence. It's an active verb, cierra, meaning that the university closes or is closing. Different meaning.