The purpose of a diagram in an informational text is to <em>summarize information in a visual way.</em>
An informational text is part of the non fiction category, it aims to share knowledge about the <em>natural or social world</em>. For that instance diagrams come in handy when trying to understand a process description, like photosynthesis.
A diagram can help us understand and remember ideas because it's a <em>graphic aid that sumarizes information</em> using visual resources.
I read this story and the answer is <span>Because he doesn’t want doctors poking and prodding her because she had such an unusual illness.... I think.</span>
Answer:
D. Chronological
Explanation:
The best answer to your question would be A. Blueprint.