This example builds a smiley face from three React components rendered as SVG elements: a yellow background circle, two eyes, and a mouth. The face is centered using a group translation, with coordinates and sizes defined as constants. The mouth uses the `arc` function from `d3` to generate a path with specified inner and outer radii and angular range. All shapes are drawn within an SVG canvas using React components, with styling handled by explicit `fill` and `stroke` properties. The visualization demonstrates modular component composition for simple geometric drawing.