Which of the following is an example of a geometric shape?

A geometric shape is a precise, mathematical concept characterized by specific properties and forms, often defined by regularity and symmetry. A circle, for example, is defined as a set of points that are equidistant from a central point, making it a perfect example of a geometric shape. It has a clear mathematical definition and can be easily represented with specific measurements like radius and diameter.

In contrast, the other options—leaf, cloud, and mountain—are natural forms that do not conform to specific mathematical definitions. They are organic in nature and often possess irregular and asymmetrical characteristics, which do not fit the formal structure of geometric shapes. Hence, the circle stands out as the only option that embodies the qualities of a geometric figure.