This example renders a smiling face in SVG using React and D3.js, with geometric shapes for the head, eyes, irises, nose, and mouth. The code constructs the mouth and nose as arcs via `d3.arc`, while the remaining features are simple circles. All elements are positioned relative to the center of a 960×500 viewport using SVG’s `transform` attribute, and React drives the component structure. The result is a static, stylized character built entirely from vector primitives and filled with solid colors.