This example shows a smiling face built from SVG primitives, with a yellow circular head, two dark eyes, and a thick crescent-shaped mouth. The face is centered within a 960 by 500 viewport using a D3 arc generator to define the mouth’s path, while React manages the component structure and rendering. The code uses d3.arc with inner and outer radii and specified start and end angles to create the smile, and positions all elements relative to a central translation group.