A smiley face rendered with React and SVG, drawn as yellow circular background, two eyes, and an arc-shaped mouth. The visualization uses hardcoded geometry rather than external data, positioning elements relative to the window dimensions. React components (BackgroundCircle and Eyes) generate the SVG markup, while the mouth path is computed using the d3.arc API from d3.v4. The example demonstrates declarative component composition with D3’s arc generator for path generation.