According to Aristotle, consistent is not common in a tragic character.
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:
The theme of this poem is that sometimes it is better for someone you love to forget you and be happy than it is for them to remember you and be sad.