Which target is essential for the enemy commander to successfully complete their mission?

The correct choice is High Payoff Target (HPT). A High Payoff Target is essential for the enemy commander to successfully complete their mission because it is a target whose destruction or neutralization would contribute significantly to the enemy's ability to achieve their objectives. Targeting HPTs directly impacts the enemy's operational effectiveness, creating a strategic advantage for the opposing force.

In contrast, High Value Targets (HVTs) may represent important military assets but do not necessarily offer the same level of strategic benefit when removed from play. While they could theoretically be advantageous to attack, they may not be critical to the immediate success of an enemy's mission. Tactical Targets and Critical Targets, while relevant, do not encapsulate the same concept of impacting the overall mission outcome as succinctly as HPTs do, especially in the context of prioritizing targets for engagement based on their potential payoff in achieving mission success.