Final answer:
In Spanish, a question is indicated by using both an opening and closing question mark.
Step-by-step explanation:
In Spanish, a question is indicated by using both an opening question mark ('¿') and a closing question mark ('?') at the beginning and end of the question respectively. This is done to differentiate a question from a regular statement or sentence. For example:
¿Cómo estás? - How are you?
¿Dónde está la biblioteca? - Where is the library?
¿Cuántos años tienes? - How old are you?
Learn more about Question marks in Spanish