'sorry, paul its a aeolian' … Fair enough Dick, if we're talking modes, but I was assuming that the original questioner needed a simple but workable answer to the question. I used the explanation above for GCSE students because it is just that- simple and workable.
Modes are a whole different ballgame. Most of the answers on this thread, although well thought out and correct are too complex for anyone who needed to ask the original question. IMO and experience. Happy New Year by the way. Hope we can bump into each other at some festival or other.