So you graduated HS in July vs. May?
So you had to attend in Summer to graduate?
If that’s true, then I think it’s fine for your guidance counselor to include something but you still have to answer the question because it’s telling you to do so.
There’s this question: “Please use the space below to provide details about the change in progression through secondary/high school that you indicated above.”
I’d simply write the reasons that you were gone - a family health matter…or whatever it was…the required you to be absent from school for the semester.
Good luck.