Which terrain feature typically has high ground on three sides?

The correct response identifies a valley as a terrain feature that often has high ground on three sides. Valleys are formed by the erosion of land over time, typically between hills or mountains. This natural formation creates a low area surrounded by elevated landforms, leading to the characteristic of having high ground on three sides. Valleys are also significant in geographical and strategic contexts, often providing routes for travel and access to resources.

In contrast, other options like a hill, depression, or saddle have different characteristics. A hill is elevated on all sides, a depression is a low point fully surrounded by high ground, and a saddle is a dip between two hills, not having a complete surrounding high ground typical of most valleys. Understanding these distinctions is essential for interpreting terrain features effectively in military operations or geographical studies.