Arguments On Why We Should & Shouldnt Have A Royal Monarchy In The UK?

Hiya guys. I really need help with my homework! Can you guys provide me with some arguments on why we should & shouldnt have a royal monarchy in the UK? Please try to make your thoughts and ideas as simple as you can, so I can actually understand them! I have searched questions like these before and all of them are way too complicated to understand. If you could provide me with any websites or links (That Are Simple Enough For Me To Understand), Then that would be great. Please dont be rude, and thanks for your help! And please try to be as quick as you can. xXx