I'm not completely sure about all these, but I'd say that these phrases best support the author's purpose of creating a positive image of a town: 'live in harmony', 'blaze of color', and perhaps 'hillsides of orchards', maybe even 'backdrop of pines'.
I'd go with B.
It'd make sense to want to stand out if the staff read a lot of essays per day. You don't want yours to be included with the uninteresting "same-old" pile.
This is a great start!
I would add something that you experienced in sixth grade that they could relate to.
Answer:
It speaks about freedom, self-reliance, and rugged individualism.
Americans are very set in freedoms. Freedom of speech, religion, thought, ect...
They also like to take care of themselves and ask help from no one. The idea of self reliance.