Question

1- ¿Quieres ir a un concierto o prefieres escuchar música en casa?

Answer 1

Is asking if you prefer to go to a concert o listen to music at home? If you say go to a concer you can write:

1) Prefiero ir a un concierto

If you prefer to listen to music at home you say:

2) Prefiero escuchar musica en casa

Answer 2

The question asks whether you would like to go to a concert or would like to listen to music.
you can write:
Yo quiero ir a un concierto
or:
Yo prefiero escuchar la música en casa.