On what basis can music be called a time based art?

Because notes, sounds and rhythm are experienced in sequence over time

Music is a temporal or time-based art because it unfolds through duration and sequence. A listener receives notes, pauses, beats, rhythms, melodies, and changes in volume one after another; their order and length help create musical meaning. A single note heard in isolation cannot provide the complete experience of a song or composition. Option A states this governing concept accurately. B confuses auditory music with static visual art, while C wrongly suggests that one instant is sufficient. D is also incorrect because changing the order or duration of sounds can change the rhythm, expression, and even identity of a composition. The key test is whether the artwork must develop over time to be experienced fully.

This is a Class 9 Art Education question. Chapter: Introduction to Art. Topic: Types of art.