Skyward1264 Ok right off the bat your intro is good but you are missing something.
Sign-posting (aka listing your arguements). In your intro it basically is required for you to get full marks.
E.g: Cats are better than dogs, 3 arguements
Cats are better than dogs as they can take care of them selves, instead of having to constantly take care of dogs. Cats also need less attention, which can benifit you when you are busily doing something, and cats are better than dogs, as (etc)