How can I include a question answer into the confirmation email subject?
Try putting the merge code for the question (https://help.surveygizmo.com/help/merge-code-intro) into the subject line. It would look something like this:
SUBJECT: We Need to Talk About This – [question(“value”), id=”11″].
I tried this myself a couple of times to make sure it worked. There is no HTML editor with a MERGE CODE option for the subject line, but you can manually type in the merge code, or you can copy/paste it from the email body.