Which of the following is a function of command in the Army?

The function of command in the Army primarily encompasses the responsibility of providing authoritative direction for mission success. This is crucial because effective leadership requires taking charge of operations, making decisive calls that align with the Army's objectives, and ensuring that all personnel understand their roles in achieving mission goals.

In the context of military operations, this involves not just the strategic planning and direction but also the tactical execution of those plans, with clear communication and a decisive chain of command. This authoritative direction is essential for coordinating efforts across various units, ensuring that all responsive actions align with the broader mission.

While ensuring morale, providing resources, and conducting evaluations are important elements of leadership and management within the Army, they fall under the broader umbrella of command responsibilities rather than defining the essence of command itself. Command is fundamentally about the decisive leadership necessary for steering military efforts towards success.