Where are fireguards not required at all?

The correct answer is Libraries. Libraries do not require fireguards as there are no activities that require fire in the library. The probability of a suspicious fire activity occurring is rare.

However, hotels, theatres, and homeless shelters are widespread for fire activity as such there’s a need for fireguards in these places for safety purposes. Therefore options A, C, and D are incorrect. I hope this helps.

The answer is librariesbecause hotels, theaters and homeless shelters are very common of suspicious fire activity.