Final answer:
The narrative flashbacks in The Sound and the Fury are regularly prompted by certain events or objects that trigger the memories of Benjy, one of the main characters.
Step-by-step explanation:
The narrative flashbacks in The Sound and the Fury are regularly prompted by certain events or objects that trigger the memories of Benjy, one of the main characters. These triggers include the smell of honeysuckle, a melody played on a flute, and the presence of his sister Caddy. Whenever Benjy encounters these stimuli, he experiences vivid and disordered recollections from his past.