In Mark Twain's "A Fable," the passage explores the theme of perspective, particularly how it can be influenced by the perceptions and understanding of those observing it. The way the animals interpret the artist's description through the educated cat highlights how information and context shape one's view of something. Given the options provided, the message about perspective conveyed in the passage aligns most closely with:
3. It can be affected by who is looking and where they are from.
The animals' excitement and their responses to the cat's explanation illustrate how their understanding of art (the "picture") is shaped by the cat's learned perspective, which may differ fundamentally from their own. This reflects the idea that perspective is subjective and can vary based on the observer's background and knowledge.