Passage Summary: Because people can now easily buy recordings of authors reading their work, fewer people are buying the actual physical books.

Reasoning: The increased availability of audiobooks has caused a significant decline in the sales of physical, printed books.

Analysis: This stimulus illustrates a simple causal relationship where a new, more accessible version of a product displaces the traditional version. It seems the convenience of hearing a story has trumped the tactile pleasure of turning a page. To find a match, look for a scenario where the rise of one medium or method directly leads to the commercial downfall of its predecessor. The key is the 'substitution effect'—one thing is being replaced by another that serves the same basic function.