This example renders a yellow smiley face as an SVG graphic using React for component structure and D3’s `arc` generator to create the mouth. The face consists of a large circle for the head, two smaller circles for eyes, and a curved path for the mouth, all positioned relative to a central transform. The code relies on D3 v7 and React 16.9, drawing shapes directly with SVG elements rather than data-driven bindings. The mouth arc uses inner and outer radii with start and end angles to form a semicircular smile.