What terrible realization does Percy make toward the end of the dream? What does the voice want from him? The Lightning Thief Chapter 12

Percy realizes that the voice wants him to steal the lightening bolt. He also realizes that the voice isn't trying to pull him into the chasm, but rather pull itself out.

Explanation:

Percy Jackson & the Olympians: The Lightning Thief

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.