Answer:
My best friend, if you ever had a "best" friend than you could write about some experiences. My family is a great option, write about some family experiences. Bullying and school are some oddballs, but they can work. I am not sure about bullying, but if you have ever been bullied or had any experiences, then you can write about what happened. Lastly if you choose school, then you can write about subjects and how you perform in them, which you enjoy etc.
Step-by-step explanation:
Honestly any of the topics could work, but something personal and well known would be easiest.