A smiling face is drawn with a yellow circular background, black outline, two eyes, and a curved mouth, all rendered as SVG shapes. The visualization is built with React components, with each facial feature defined in a separate file using ES6 modules and React Fragments. The mouth uses D3's `arc` function to generate the path, while the overall layout positions elements relative to the center of a 960x500 SVG canvas. ReactDOM renders the composed SVG to the page.