Final answer:
The line “He is a Cossack,” said the general, and his smile showed red lips and pointed teeth. “So am I,” best reveals General Zaroff's true nature in “The Most Dangerous Game.”
Step-by-step explanation:
In Richard Connell's short story “The Most Dangerous Game,” the line that best provides a glimpse into General Zaroff's true nature is: “He is a Cossack,” said the general, and his smile showed red lips and pointed teeth. “So am I.” This line reveals the underlying predatory and animalistic characteristics of General Zaroff, contrasting with the outward image of an aristocratic gentleman. The mention of his red lips and pointed teeth, alongside the connection to the Cossacks, known for their ferocity, suggests a sinister aspect to his persona.