We can see here that matching the paragraph from the passage to how it develops an idea, we have:
Paragraph 5: showcases the strength of the new stone fort
Paragraph 1: introduces the subject of coquina stone
Paragraph 7: details the effect of the need to create a strong fort
The idea of a story refers to its central concept or main theme, the fundamental concept that the narrative revolves around and conveys to the audience. It's the underlying message, moral, or premise that the author aims to communicate through the narrative.
This idea serves as the backbone of the story, providing the purpose for its creation and guiding the plot, character development, conflicts, and resolution. It represents the core concept that the author wants the readers or audience to contemplate, understand, or reflect upon after experiencing the story.