Which of the following is NOT one of the 5 major terrain features?

The identification of the correct answer as the feature that is NOT one of the 5 major terrain features is based on an understanding of standard military mapping and land navigation principles. The five major terrain features commonly recognized are hill, valley, ridge, saddle, and depression.

In this context, while a canyon may indeed be a significant landform, it does not fall under the category of the basic major terrain features used in military operations and navigation. The features of hills, valleys, ridges, saddles, and depressions serve as fundamental descriptors for understanding and portraying terrain on maps, essential for tactical planning and movement.

Therefore, recognizing that a canyon does not fit with these core categories is crucial. This understanding helps in effectively interpreting military maps and planning maneuvers in various terrains.