Passage Summary: Music happens in a specific order over time, but since you can look at a painting in any order you want, the author thinks looking at a painting doesn't involve time at all.

Conclusion: The fundamental difference between music and painting is that music is experienced over time, whereas viewing a painting is not.

Reasoning: Music is composed of sounds and silences in a specific order, while paintings do not force the viewer's eye to follow a specific sequence.

Analysis: The author makes a massive leap from 'no fixed order' to 'no temporal dimension.' Just because there isn't a required sequence for your eyes to follow doesn't mean the act of looking doesn't take place over a period of time. As a tutor, I'd point out that the author is confusing the structure of the medium with the experience of the viewer. Look for an answer that identifies this failure to recognize that even a non-sequential experience still occupies time.