A smiling face rendered as a collection of SVG shapes, built with React and D3. The face shows a yellow circle with a black border, two dark eyes with white highlights, a mouth drawn as an arc, and a nose as a smaller arc. The code uses React to structure the SVG elements and the `arc` generator from `d3` to compute the path data for the mouth and nose. All coordinates are calculated relative to the center of the 960×500 viewport.