I think that depends that you like to explain in you own person, to talk about the music, for example to express your ideas for other people!! :D

I think that you have choose the topic that do you like, because you have to explain very well, do you speak about your favorite group, food, sport someting like that and remember don't read your presentation because the topic will be very boring that is my advice for you.

For any presentation, if you get to choose a topic for whatever reason, it's best to pick something you enjoy and would love to animatedly talk about.

i think that it depends on the people who expose them because you have to chose a topic about they are interesting.

I think that depends that you like to explain in you own person, to talk about the music, for example to express your ideas for other people!! :D but somethig that you feel interesting to explein to people and talk about it with sure and be creativity, to the people be interesting in your topic; something!! so good luck!!