My daughter wants to know, "why is Jesus my savior"?

I couldn’t tell her because I don’t know much about Christian theology or practice or philosophy. I need something that is fit for the attention span of a thirteen year-old. You don’t have to talk down to her, but it does have to be concise.

I’m not sure exactly what she’s asking. It’s not about the history, or what the Bible says. It’s more personal. Why is Jesus my savior instead of someone else? Why is he a savior? Why is he my savior instead of being someone else’s?

The underlying assumption, here, which is not up for debate, is that there is a Jesus who does some saving.

Anyway, one paragraph max. She’ll tell me who gets GAs.