Answer:
In Narrative, elaboration means to be more descriptive and help the reader feel like they are in the story. In Informational, elaboration means to explain the main idea in depth using key details that also describe or develop the topic.
The purpose of elaboration is to develop ideas so that readers can understand and appreciate a writer's message (theme, main idea, claim, thesis, etc.); therefore, thoughtful elaboration is always guided by the purpose for the writing and the needs of the audience.
Step-by-step explanation: