Additional Essays after Apps are Submitted

<p>Hello,
I recently applied to a few schools and for one I was deferred from EA into RD. They said I was welcome to submit "additional" information, which I'm assuming would help my case. Are there any specific things I should mention in this essay?
Additionally, another school said I was welcome to submit a letter instead of doing an interview (I missed the deadline to request an alumni interview), what should I put in this one? Are there any specific questions interviewers ask that I should answer in this letter?</p>

<p>Any feedback or suggestions would be greatly appreciated. Thank you! :)</p>

<p>I would suggest asking these questions in the Parents Forum.</p>