Which of the following is NOT one of the four motivational categories of terrorism?

The correct answer is "Peacekeeping" because it does not align with the established categories that define the motivations behind acts of terrorism. Terrorism is typically categorized into four main motivational types: separatist, revolutionary, nationalistic, and religious. These categories reflect the underlying goals or aspirations of terrorist groups – for instance, separatist movements often seek autonomy or independence from a larger entity, while revolutionary groups aim to bring about significant political or social change.

"Peacekeeping," however, is fundamentally different as it refers to efforts aimed at maintaining peace and preventing conflict, often through diplomacy and intervention rather than through violent actions like terrorism. This distinction underscores why "Peacekeeping" is not considered a motivation for terrorism; it indicates a constructive approach rather than a destructive one. Consequently, "Peacekeeping" stands out as the option that does not belong among the motivations associated with terrorism.