Which of the following is not one of the five major terrain features?

In military map reading and terrain analysis, the five major terrain features typically identified are hills, valleys, ridges, depressions, and cliffs. While hills, valleys, and ridges are indeed part of the major features, cliffs are not categorized as such. Instead, cliffs are often considered a minor terrain feature that may play a role in operations but do not fit into the primary framework of major terrain features used for tactical planning and navigation. Understanding these distinctions is crucial for effective terrain analysis, as it influences decision-making during operations. Hence, identifying cliffs as not one of the five major terrain features is accurate and reflects a fundamental principle in military mapping.