Read this scenario a young boy travels through the woods alone to find an ancient treasure. along the way he battles different creatures who tempt him. a forest nymph delights his nose with a meal of delectable fruits. a motherly fairy entices him to rest in a cozy bed. finally a wily fox promises to warm him with a coat made of fine fur. the boy denies each creatures gift and continues to seek the treasure until he finds it and returns home

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.  

many is the pronoun that is used in this sentence. many is a quantifier that determines the amount of discoveries. when we use quatifiers followed by nouns, they act as determiners, but when they are used without a noun, as it is this case, they are pronouns.