This example shows a static smiley face built with React and D3, rendered as SVG. The face consists of a yellow circle with a black stroke, two black eyes, and a mouth drawn using an arc path. The code uses `d3.arc` to generate the mouth’s curved shape, with coordinates and dimensions derived from a centered group element. The React component structure applies fixed numeric values for positioning, and the visualization is purely presentational with no data input or interaction.