How do those lines apply to your life? This isn't a question that has one correct answer, but it could be figured that you eat bread right? If you're trying to be philosophical about it, you could talk about how the thunder accompanies the rain and plants are fed by rain, you are fed by plants therefore you shouldn't fear the thunder. This question is entirely up for interpretation.
A term for a story within a story would be called a frame story.
I hope this helps!
"Autobiography" means a biography of oneself, that is, the author is describing their own past and their own life.
When you describe your own life, typically you would write it in the first person ("I") and this is also true for Barrio Boy.
The best reason a formal tone and language should be used in a professional electronic communication is because informal communications are more easily misinterpreted. The correct answer is A.