Suppose an IELTS examiner asks me
"Do you live in the town or a city?"
If I answer
I have been living in a city for over 30 years.
and then talk a lot about cuisines, must-see places in my home town
Is the second part (cuisines, must-see places ) a little bit of off-topic?
by "off-topic", I mean
not relevant to the subject under discussion