Which technique helps singers to sing in smooth transitions?

The technique that enables singers to achieve smooth transitions between notes is legato. When performing in a legato style, singers connect their notes seamlessly without any perceptible break or gap. This approach emphasizes the fluidity of the melody, allowing for a continuous and flowing sound. It involves maintaining a steady airflow and utilizing controlled breath support, which facilitates the smooth transition from one note to another.

In contrast, staccato (the first option) involves singing each note sharply and separately, creating a distinctly disconnected sound that does not lend itself to smooth transitions. The terms forte and piano refer to dynamics, indicating whether the music should be sung loudly or softly, respectively. While these dynamics can affect a performance's emotional quality, they do not directly relate to the technique of achieving smooth transitions.