The best choice is "Snowball, characterized as a traitor, shows how dictators use scapegoats to ramp up fear and keep control."
In the passage, Napoleon uses the character of Snowball to instill fear in the other animals and to consolidate his power. By presenting Snowball as a constant threat, Napoleon effectively creates a scapegoat for any problems or troubles on the farm, which helps him maintain control over the other animals. This manipulation highlights the tactics that dictators often use—deflecting blame onto a perceived enemy to unify their followers through fear and to justify their own actions and authority.