This example demonstrates how to build a smiley face using React and D3 v7, rendered as SVG. It shows a yellow circle with black outlines, eyes, a red nose, and a smile arc, all positioned relative to a central group. The code uses D3’s `arc` API to create the mouth and eyebrow paths, with React managing the component structure. The face is centered via transforms, and a separate line element is added below, though its placement appears partially incomplete.