What is the definition of "melody" in music?

The correct understanding of melody in music is that it refers to a sequence of notes that are perceived as a single entity. This means that when notes are played in succession, they create a recognizable musical line that can evoke emotion and meaning, allowing listeners to identify and remember the tune. Melodies are typically characterized by their pitch, rhythm, and contour, shaping the overall musical experience.

In contrast, the other options pertain to different musical concepts. The combination of different musical notes played simultaneously refers to harmony, while a pattern of sounds in time relates more to rhythm rather than melody itself. The speed at which music is performed pertains to tempo and does not define melody. Thus, option A captures the essence of melody as it emphasizes the linear progression of notes that listeners perceive cohesively.