What tactical mission task is designed to upset an enemy's formation, interrupt their timetable, or cause them to commit forces prematurely?

The choice of "Disrupt" is correct because it specifically refers to actions aimed at interfering with the enemy’s operational plans and objectives, which includes upsetting their formation, interrupting their timeline, or forcing them to commit their forces prematurely. In a military context, disruption is a critical tactical objective that seeks to create confusion and diminish the enemy's effectiveness.

Disrupting an enemy's activities not only brings immediate operational advantages but also serves to create longer-term impacts by undermining their strategy and cohesion. This task can involve a variety of actions, such as indirect fires, ambushes, or other forms of engagement that cause the enemy to react rather than act according to their initial plans.

The other tactical tasks listed, such as “Divert,” “Defeat,” and “Deceive,” serve different purposes within military operations. While diversion can draw the enemy's attention away from a primary objective, and defeat implies a definitive victory over the enemy’s forces, deceive focuses on misleading the enemy about intentions or capabilities. None of these primary tasks align as closely with the goal of causing disruption in the enemy’s operational tempo as the task of "Disrupt" does.