A yellow smiley face rendered with React and D3 draws on an SVG canvas. The face uses a yellow circle with a black stroke for the head, two black circles for eyes, and a D3-generated arc path for the mouth. The React component structure defines the SVG elements, while the D3 `arc()` generator calculates the mouth’s curved shape. The example demonstrates a minimal integration of React for UI composition and D3 for geometric path generation, with all drawing occurring in the SVG coordinate space.