A pronoun shift is when you modify the pronoun in the same sentence, then the reader is not able to understand who is the subject of the sentence.
In the exemplified sentence the pronoun inserted incorrectly is <u>they</u>, shifting the initially singular subject "The student" (pronouns he or she) to a plural pronominal form.
When correcting, the writer must evaluate which is the desired pronoun, that fits his subject.:
<em>(Singular form) If the student feels ill, he/she should be sent to the nurse.
</em>
<em>(Plural form) If the students feel ill, they should be sent to the nurse.</em>
So, the pronoun shift that should be circled is They
This is what came up for that: https://www.google.com/search?q=mother+cinquain+poem&tbm=isch&source=univ&hl=en-us&client=safari&sa=X&ved=2ahUKEwjm2PCb5IXnAhWFMX0KHahQDS8QsAR6BAgJEAE&biw=1112&bih=712
Answer:
He was shocked when she kissed him, because she was white. This shows that interracial relationships or any sort of intimacy was unusual for people in Maycomb. He was also scared because he knew that it wasn't normal for that to happen and worried about what would happen and or what people would say because she was a white woman, and no one was going to believe that he didn't kiss her back.
Hope this helps!