I feel like all of these fall under egoism except for selflessness
B-Motivation. All others are outer influences that affect behavior.
I believe cellphones should be allowed to use in schools because, research purposes and taking pictures. Phones are a great source of research instead of having to take up space in the computer room. They also take pictures, so students are able to record lectures and take pictures of notes.
Under is the prepositional phrase. Remember prepositional phrases show location. Under ins the only word that does that. Good luck my man.