Students because their is referring to the students. Students is the antecedent because an antecedent is just a phrase that replaces the third-person personal noun. Their would be the personal noun. Hope this helps!
To leave out personal opinions
Yes you should! I watched it and it was amazing! But if you do not like violent scenes than you maybe shouldn’t watch it. It has some violence and has monsters that look bloody and may be scary to some people. It also curses sometimes. Hope this helps. :)
Usually for profession or business purpose writing.
Please add your modes of narration