This example draws a smiling face with eyebrows, eyes, and a mouth using React and D3 v5 in an SVG renderer. It shows a yellow circular head centered on a 960-by-500 canvas, with green arcs for eyebrows and darker arcs forming an open mouth. The code constructs the face using D3’s `arc` generator to define the mouth and eyebrow paths, while React handles the SVG elements, including circles and ellipses for the eyes. All styling and dimensions are computed inline, with the face composed from separate transformed path groups.