A smiley face is drawn as a set of SVG shapes, with a yellow circle for the head, two black circles for eyes, and a curved arc for the mouth, all positioned relative to a central point. The visualization demonstrates how to compose a static graphic using React to render SVG elements, while the mouth is generated with d3’s `arc` generator, which calculates the path from inner and outer radii and start and end angles. The code defines constant dimensions for the face features and uses the ReactDOM `render` method to mount the component.