Fill in the blank with correct form of the verb.

A Ellostes
escuchar música. (gustar)

A Ellostes le gusta escuchar música.

A Ellostes les gusta escuchar música.

To fill in the blank with the correct form of the verb "gustar" in the sentence "A Ellostes les gusta escuchar música," you need to determine the correct form based on the subject "Ellostes."

"Gustar" is a Spanish verb that is conjugated differently than regular verbs because it is used to express likes and dislikes. Its conjugation depends on the subject or the thing being liked.

In this case, the subject "Ellostes" is the third person plural (they). Therefore, you need to use the corresponding form of the verb "gustar," which is "gustan."

The correct sentence would be:
A Ellostes les gustan escuchar música.