according to the author, the growing number of people living alone -
f makes it difficult to study how happy people are
g
is an inevitable result of a decline in family values
h
should not be interpreted as a sign of increased loneliness
i will almost certainly affect the economy in a variety of ways

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.  

ill need more info in order to answer yer ?

you need to make an explanation. so, since you did not include one, so no one, and i mean no one can unfortunately you,

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ndhehdhdhdhd 4ncnrct y

y