Can work managers not allow employee to have 15 min breaks? is anything like that a law or what?

Unfortunately, America is a pro-business country and not a pro-employee one. According to federal law, workers are not entitled to meal or rest breaks under it. Even rest breaks and meal breaks counting as hours worked are subject to very byzantine rules and regulations.

To complicate matters more, each state has its own set of rules and some states are more progressive while others are staunchly anti-workers. This is one of the reasons why worker unions are so important but they have been decimated by decades of adverse judicial and legislative decisions and by globalization.

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.  

we need to see the examples!