"Mother and aunt."
Translation:Мати і тітка.
None, really. Only the way it sounds. You can use either whenever you feel it'll sound better, the way I understand it. The only differences there are are that ''ta'' is more literary or fancy and ''a'' is like a combination of ''and'' and ''but''; some sort of ''whereas''.
WHY is it when I try to leave a Reply to someone's question, an 'Error' message comes on and does not allow my answer to be posted?? This has happened at least 20 times to me! What a waste of time and effort trying to genuinely help others in need!!! DUOLINGO, PLEASE FIX THIS!! Thanks.