Αυτό το θέμα? There is nothing to indicate that the subject is grammar.
Yes, I've changed the sentence and added θέμα to the hover hints.
Where did θέμα come from? Has been υποκείμενο throughout this section so far and I’m nearly at the end of level 5! A trifle confusing....
It means both and both are accepted as correct and both are shown in the drop down hints. Sorry for the confusion. I've put "υποκείμενο" at the top.
Thanks jaye16! Will try to remember θέμα as well...
Would it be correct to say
το υποκείμενο αυτό
yes, it has been added.