A green smiley face is drawn in SVG, with two empty circles for eyes and a large green circle for the head, all rendered on a 960-by-500 canvas. The visualization is generated directly in the HTML markup using static SVG elements, while a separate React app using React 18 and ReactDOM renders a simple "Hello green face" message to a root div, though this text is not visible in the final output. The code relies on SVG circle elements with specific coordinates and stroke properties to create the face.