Which term describes the emotional expression in music?

The term that best describes the emotional expression in music is dynamics. Dynamics refer to the variations in loudness and intensity in a piece of music, which can significantly impact the emotional response of the listener. For instance, soft passages might evoke feelings of calmness or intimacy, while louder passages could create excitement or tension.

In contrast, articulation relates to how notes are played or sung, affecting the clarity and style of the performance, but not directly the emotional content. Melody refers to the main theme or tune of the piece, which can carry emotional weight but is not solely about emotional expression. Harmony involves the combination of different musical notes played or sung simultaneously, contributing to the overall texture and mood but not specifically denoting emotional intensity in the same way that dynamics do. Thus, dynamics are integral in conveying the emotional nuances within a musical performance.