What natural feature is described as a convex landform?

A summit is characterized as a convex landform because it refers to the highest point of a hill or mountain, which typically has a rounded or peaked shape. This convexity distinguishes it from other landforms. For instance, valleys are low-lying areas between hills or mountains and would be considered concave. Similarly, plains are broad, flat areas that do not exhibit the same convex characteristics as a summit. Cliffs, while they may have steep vertical drops, are not typically described as convex since they do not form a rounded peak. Therefore, a summit is the natural feature that fits the description of a convex landform.