Simpler wording/defining,
Answer:
B
Explanation:
There should be an 'and', or some other form of punctuation between the clauses
A prepositional phrase describes the noun in this sentence the prepositional phrase is "of support" it is describing "letter" so the object of the preposition is "letter"
"the relevance of the idea to your life"
When analyzing or writing a paper about a fictional work, you could analyze the symbolism and/or implications in the piece of fiction. In the academic setting, it simply doesn't matter if ideas conveyed in writing impact your life or not.