What does the term "contour" refer to?

The term "contour" refers to the shape or outline of an object or figure. In various contexts such as art, geography, and design, the contour defines the boundaries and form of the subject. For instance, when drawing, an artist often focuses on the contour lines to capture the essence and shape of their subject. In geography, contour lines are used on maps to represent elevation changes, helping to illustrate the outline of terrain features. Understanding contour is essential for recognizing how shapes are formed and perceived visually.

The other options do not align with the definition of contour: the first option relates to an action of reducing size, the second describes a physical property of fluids, and the last one suggests a mechanical action of pressing, none of which correspond to the concept of shape or outline.