Which action describes the tactical mission task 'Interdict'?

The correct choice clearly defines the tactical mission task "Interdict." This task focuses on the overarching goal of preventing, disrupting, or delaying an enemy's ability to utilize specific areas or resources effectively. By interdicting, forces aim to hinder the enemy's movements, supply lines, or operations within a defined space, thus gaining a strategic advantage. This approach is fundamental in modern warfare, where controlling territory and resources can significantly shape the outcome of engagements.

In regard to the other options, sealing off support lines relates more closely to isolating the enemy rather than the broader mission of interdicting. Attacking through defenses refers specifically to offensive maneuvers instead of disruption tactics. Lastly, conducting defensive operations for a main body aligns with protective strategies rather than the proactive disruption implied in the task of interdicting. Understanding these distinctions helps clarify the specific focus of the interdict mission task within the context of tactical operations.