Final answer:
To determine another central idea and develop it, closely read the text for patterns, create an outline with clear topic sentences and evidence, and validate body paragraphs for coherence and support.
Step-by-step explanation:
To determine another central idea of a text, you would need to reexamine the content thoroughly. This process includes identifying literary devices, constructing an informal outline, and writing a first draft to support your interpretation.
When analyzing 'Written in Bone', you should particularly pay attention to how the author develops the central ideas by looking for patterns, repetition, or interruptions that could reveal deeper meanings or themes. While analyzing the body paragraphs, ensure they provide adequate background information linking back to the thesis and contain a clear main point that supports the thesis with concrete details and evidence.
Writing an outline for each body paragraph can help organize your thoughts, with each topic sentence relating to the thesis and including relevant textual evidence for support. Lastly, consider the validity of your paragraphs. This involves checking whether the topic sentences and the supporting sentences are coherent and contribute effectively to the development of the central idea.