Which tactical movement technique should patrols use to remain undetected?

The chosen answer emphasizes the importance of using established terrain features for concealment, which is a fundamental principle in reconnaissance and patrolling operations. By utilizing the landscape—such as hills, foliage, and natural cover—patrols can effectively obscure their movements from potential observers, thereby reducing the likelihood of detection.

Terrain features provide not only visual cover but also physical barriers that can shield the personnel from enemy sight and engagement. This method allows patrols to approach their objectives or maneuver through areas of interest while remaining unseen, which is crucial for maintaining operational security and achieving mission objectives.

In contrast, the other options present tactical approaches that are less suited for stealth and concealment. Advancing straight toward a target lacks the subtlety required for undetected movement, and maintaining complete silence, while important, does not guarantee concealment from visual detection. Similarly, moving in large groups may increase speed but significantly raises the risk of being spotted, as larger formations are more noticeable and harder to conceal compared to smaller, adeptly maneuvering units.