Final answer:
The statement is true; in pop ballads, vocal techniques such as ornamentation, melismas, and rubato are used to add emotional dimension to the song.
Step-by-step explanation:
The statement that the three vocal techniques commonly found in a pop ballad are ornamentation, melismas, and rubato is true. In the genre of pop ballads, these techniques are often employed to add emotional depth and complexity to the performance. Ornamentation refers to decorative musical flourishes that embellish the melody. Melismas are a vocal technique where a single syllable of text is sung across several different notes, adding a sense of fluidity and expressiveness. Lastly, rubato is a musical term for expressive and rhythmic freedom by slightly speeding up or slowing down the tempo of the music, which enhances the emotional content of the song. These elements together contribute to the unique and evocative style of pop ballads.