I voted for development although all other options also count among its purpose. I think it is hard to limit tarot just to one "use", tarot is very broad in its way.
I would have taken 1, 2 and 4 if it were multiple choice, but since it's not, I thought about it and decided that the choices we make and the things we learn are also part of our development - so that's the choice I ended up with.
I would choose them all, given the possibility. I find Tarot wide-ranging enough for them all, and well adapted to all sorts of uses. But since I had to choose one, I picked the first, as representing to me the umbrella use - it includes all the others.
i chose 2 and 3 these too me have the best qualities for reading Tarot and for gaining alot of insights for people who have hidden issues about their lives.