This example renders a classic smiley face as a scalable vector graphic using React and D3. The face is composed of a yellow circle background with a black stroke, two black eyes positioned symmetrically, and a curved mouth created with the D3 `arc` generator. All shapes are drawn directly as SVG elements within a React component tree, with the mouth’s path computed from inner and outer radii and angular start and end points. The layout uses fixed pixel dimensions and centers the face via an SVG transform.