Answer:
I've not read Farenheit 451, but from the quote I believe it's trying to say "it doesn't matter what you do, as long as you impact it enough to be remembered" or something similar, though again I may be wrong as I've not read the book.
B.) Editing, hope this helps.
What's your evidence though because theres a lot of organization methods
She matures by
1. she hates Peter in the beginning but towards the end she matures and begins to love him
2. she respects her mom towards the end
3. she wanted to be a famous actress towards the beginning but then at the end she wants to be a mature writer
Hope this helps! Have a great day!