Final answer:
The author uses the detail of intrigue and the human need to know to develop the central idea that humans are hard-wired to be intrigued and seek answers, even when they may have no initial interest in a topic.
Step-by-step explanation:
The author uses the detail of intrigue and the human need to know to develop the central idea in this passage. By posing the question of the first choice for the Harry Callahan role and stating that viewers with no interest stuck around to find out, the author highlights the universal curiosity and suspense that drives human behavior.
The author wants to tell the reader that humans are hard-wired to be intrigued and seek answers, even when they may have no initial interest in a topic. The excerpt demonstrates how the author effectively creates suspense and captures the attention of readers by harnessing their innate curiosity.
I think these details could be made stronger by providing specific examples or anecdotes that illustrate how this tactic of creating suspense and curiosity through unanswered questions has been successful in other contexts.