Which of these songs is not on the "untitled" album by Led Zeppelin?

The song "Celebration Day" is not on the untitled album by Led Zeppelin because it was released on their 1970 album "Led Zeppelin III." The untitled album, commonly known as "Led Zeppelin IV," is one of the most iconic and commercially successful albums by the band, featuring legendary tracks like "Stairway to Heaven," "Black Dog," and "Rock and Roll." While "Celebration Day" is a great Led Zeppelin song, it is not included in this particular album.