The author can use many things such as sentence manipulation, the addition or lack there of for details, and even building up and tearing down momentum.
The answer to your question would be C. Repetition.
The sentence that contains an unnecessary shift in verb tense is the second one - Lee noticed a problem and alerts a teacher.
It should be <em>alerted, </em>which is the past tense as the first verb <em>noticed.</em>
Answer:
It definitely adds more meaning to the story than what was already there. I think it can definitely put you in a better place of understanding especially if you've had a loss like that. Knowing this makes me respect the book, and the writer them self more than I already did. Lovely book of I may say.