This is the 15027th most frequent Korean word.
발라드를
"발라드를" is the accusative form of "발라드," meaning "ballad," a type of song or poem.
In this sentence, '발라드를' is the object of liking, emphasized as the most liked kind of music.
나는 발라드를 가장 좋아한다.
I like ballads the most.
Here, '발라드를' is the object of listening, referring to a specific type of music.
그녀는 발라드를 듣고 감동받았다.
She listened to the ballad and was deeply moved.
In this usage, '발라드를' is the object of the act of listening, emphasizing immediacy of the action related to a ballad.