WikiAnswers will not write your topics for you, but we WILL help you learn how to do it yourself! Click on the related link to learn more about topics.
You need to decide what is the most interesting point of this assignment for you, because writing is easiest if you write about something you find interesting!
Nobody else can give you a "good topic" because our ideas will not be interesting to you. Pick the thing that you think is most interesting or most important, and make that the topic.
If you just start writing, you will be through with your assignment before you know it!