This question is incomplete, here´s the complete question.
Read "Ghost Sickness," the final story of the Kali Fajardo-Anstine´s short story collection, "Sabrina & Corina."
How does the extra credit question relate to the relationship between Ana and Clifton?
Answer:
That last question leads her to remember the Navajo Origin story Clifton once told her about it while trying to distract her while removing a tick from behind her ear.
Step-by-step explanation:
The extra credit question is to describe the origin myth of the Navajo people. Ana has realized that she has Ghost Sickness, meaning that Clifton is dead, and that question brings back memories of him and his attraction to their culture.