This example shows a simple smiley face rendered as an SVG graphic, built with React and D3. The face consists of a red circle for the head, two black circles for eyes, and a curved mouth created using D3’s `arc` generator with specified inner and outer radii and start/end angles. The component uses hard-coded dimensions and positions, with React managing the SVG elements and D3 handling the mouth path calculation. The result is a static, self-contained visualization without interactivity or external data.