A smiley face rendered as SVG uses React components to draw yellow and black shapes. The face loads from static code, with the background circle and mouth built through the `arc()` helper from D3 v5, while the eyes are simple React `<circle>` elements. All shapes are positioned relative to a central `<g>` group. The visualization demonstrates combining React for component structure with D3 for geometry calculations, specifically using `d3.arc` to generate the mouth’s path data.