Put the peruser in medias res that is, in things. ...
Challenge the peruser by talking legitimately to him/her.
Tell the peruser about the Dubai Research Papers what you would prefer not to do in your composition.
The broadest response to that question is that your exposition can be about nearly anything, as long as it fits the brief you've picked or been given. In some sense, it's simpler to state which subjects you shouldn't use for your school application paper.