Final answer:
Continuing with more details is the best way to build on the narrative.
Step-by-step explanation:
The BEST way to continue your narrative in order to build on what you've written so far is to continue with more details.
Continuing with more details will help to enhance the story, create a clearer picture for the readers, and develop the characters and plot. This will make the narrative more engaging and keep readers interested in finding out what happens next.
By adding more specific information, vivid descriptions, dialogue, and other details, you can bring the story to life and make it more relatable and interesting for the readers.