There are too many students not turning in their cellphones during homeroom. the situation is getting out of hand.
metaphor
simile
idiom
repetition

Hello :)

A metaphor is is when you compare something NOT using like or as, for example, Mary's voice is music to my ears. So that can be the first one to go because they aren't comparing anything in this sentence. A simile is when you compare something using like or as, so that cant be the answer because they aren't comparing anything in this sentence, and they aren't using like or as AT ALL. An idiom is a figurative device used when a sentence has a figurative meaning and a literal meaning. This i used here when it stated "The situation is getting out of hand." this has figurative meaning and a literal meaning. The figurative meaning is the  situation is getting out of hand, but this literally means that the problem it is getting out of control or no longer possible to manage, because when something is out of your hands you obviously cant control it. repetition is used when a sentence repeats a phrase or word over and over again sometimes to get a point across or sometimes to make something more memorable, this isn't used here.

So the best answer here would be idiom.

they fear for their lives