A yellow smiley face rendered as SVG circles uses React components to position a large circle for the face, two smaller circles for the eyes, and relies on ReactDOM to mount the visualization into the DOM. The code defines geometric constants for the face radius, eye radius, and offsets, then applies a black stroke to the outer circle with a fill color. This example demonstrates declarative SVG rendering through React's component model, where all shapes are computed from proportional relationships derived from the smiley radius.