Read the following example paragraph (with each sentence numbered) and then answer the questions. (1) Although Aristotle was Plato’s student, the two philosophers had very different ideas of what made a person good. (2) For Plato, goodness was knowing the right thing to do in every situation. (3) If someone has the right knowledge, he or she will always do the right thing. (4) If someone does the wrong thing, it is because he or she doesn’t understand what “right” really is. (5) Plato died at age 80 in 348 BC. (6) His student, Aristotle, thought that being good was less about knowledge and more about action. (7) A person with a good character will perform good actions. (8) To develop good character, a person should live moderately.

Which sentence is the topic sentence of the paragraph?
Which sentence is irrelevant to the paragraph?
What structural order does the paragraph use?