A smiling face rendered with SVG elements is built using React components and D3's arc generator. The visualization constructs a yellow circle for the face, two smaller circles for eyes, and a curved path for the mouth, all positioned within a centered group. D3's `arc()` API defines the mouth's inner and outer radii and angular range, while React handles component composition and SVG attribute binding. The code uses static coordinates and computed constants rather than data-driven values, producing a fixed, geometric illustration.