que significa which
Hola Migdalin "Which" is used instead of "what" when there is a list to choose from.
For example you could ask the question "What music do you like?"
and get a long list
Then you would say "Yes, but WHICH one do you like best?" and not "WHAT one do you like best?"
Which translates to Cuál e.g. ¿Cuál es tu numero de teléfono? Which is your telephone number?