Which of the following is classified as a discrete feature?

A discrete feature is characterized by distinct, separate entities that can be counted or categorized. These features often represent specific locations or occurrences, such as points, lines, or polygons.

In this case, a highway is a clear example of a discrete feature because it exists as a defined linear entity that can be mapped and identified as a specific object within a geographic space. Highways have distinct boundaries and can be characterized as individual segments of transportation infrastructure that are separate from the surrounding environment.

On the other hand, rivers, while they have distinct shapes, often reflect continuous features as they flow through landscapes without clearly defined boundaries. Similarly, a temperature gradient and soil moisture represent continuous phenomena that vary smoothly over an area rather than having distinct, separable units.