Pick the issue you're most passionate about and share why.
That's not easy to choose. But for the sake of the question, LGBT rights. Since I was old enough to form my own opinions i've been vocal about how badly many people within the LGBT community are treated, and how the lack of rights available to them is unjust. As I got older I became more aware of the real issues, the legislation and prejudices, and was able to undertake research to develop my own opinions. I've always believed love is love, and that there is no reason to treat other people differently.