Final answer:
Frederick Douglass uses a mix of long and short sentences to vary sentence structure in his writing, creating a more engaging narrative for the reader.
Step-by-step explanation:
In the passage from Narrative of the Life of Frederick Douglass, Douglass employs the technique of varying his sentence structure to make his writing more engaging. This can be observed in the way he uses a mix of long and short sentences to create a rhythm in his narrative which helps to maintain the reader's interest. He begins with a longer, more detailed sentence about arriving in Baltimore and then varies the length of subsequent sentences as he describes his actions upon arrival and introduces new characters and settings.