Which of the following is a supplementary terrain feature?

A supplementary terrain feature is one that enhances or adds detail to the primary features, providing important information for navigation and tactical analysis. In this context, a "cut" refers to a feature created by excavation, such as a road cut through a hill or terrain that has been altered to create a passage. It serves as a supplementary detail that can indicate the direction of travel, potential obstacles, or favorable terrain for movement.

Hills, ridges, and valleys are considered primary terrain features, as they are significant natural landforms that are fundamental to understanding the larger landscape. They are crucial in determining line of sight, movement, and positioning in tactical scenarios, but they do not provide the same supplemental information that features like a cut do. A cut, on the other hand, can drastically affect the immediate area, indicating potential advantages or disadvantages in a tactical situation.