Which section MOST CLEARLY supports the generalization that everyone uses the amazing substance known as glass?
A) section three
B) section four
C) section five
D) section seven

the answer is actually section 7

Explanation:

if you read paragraph 7 it says "It was through these natural events that people discovered the amazing substance known as glass. After its discovery, people began manufacturing glass and using it for many practical and artistic purposes. Today, glass is an important part of our everyday lives. Just look through any window!" so that is why D is your correct answer :)

explanation:

why r u giving free points

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.