Final answer:
The killer's victim type, weapon choice, convincing backstory, and depiction of victims' terror are critical factors in creating a compelling and believable narrative in storytelling.
Step-by-step explanation:
The comfort killer's victim type is essential for building tension and creating a convincing narrative in a story. The weapon used by the killer must be creative and fit the killer's character; this coherence enhances the believability of the story. Furthermore, the killer's backstory is critical to understanding their motivations; it should provide a plausible explanation for why the killer is deranged and became a murderer. Lastly, the depiction of the victims' terror, with realistic screaming and fear, should convey authentic emotions to grip the readers and make the scenes feel genuine.