Which of the following is a criteria for selecting a mortar position?

Selecting a mortar position is a critical task that involves various factors, with range being one of the most significant criteria. The range of the mortar directly impacts its effectiveness in delivering fire support to the intended target. It determines how far the mortar can accurately engage enemy forces or provide support to friendly units. A position that does not allow the mortar to operate within its effective range may render it ineffective in combat scenarios, limiting its overall contribution to the mission.

While the other factors, such as availability of ammunition, unit morale, and soldier fatigue, are certainly relevant in the broader context of operational effectiveness, they do not inherently influence the selection of the physical position of the mortar itself. Range is essential for ensuring that the mortar can achieve its intended operational objectives by delivering rounds accurately and effectively to the desired distance. Thus, selecting a position based on range is crucial for successful mortar operations.