What are the two supplementary terrain features?

The correct response highlights the supplementary terrain features known as "Cut and Fill." These features are essential in military operations as they relate to how terrain is altered, especially in relation to transportation and tactical advantage.

"Cut" refers to areas where the terrain has been removed or excavated to create a level surface or to facilitate movement, such as through a hill. This can be critical for creating roads, tank trails, or establishing defensive positions.

"Fill," on the other hand, involves adding material to an area to raise the ground level, which can help create embankments or to redirect water flow. Understanding these features is vital for engineers and soldiers who need to navigate and utilize the terrain effectively during operations.

The other options mention features that are significant in their own right; however, they do not specifically classify as supplementary terrain features in the same category as "Cut and Fill." A hill and a valley are primary features, while cliffs and spurs describe the vertical elements of terrain. Draws and ridges are also fundamental terrain features but do not fit into the supplementary category defined by military standards.