A smiling face is drawn as a centered yellow circle with a black outline, white-ringed eyes, and a white mouth arc. The example demonstrates how to build static SVG graphics declaratively with React components while using D3’s `arc` generator to compute the curved mouth path. The face is positioned via a `translate` transform, with all dimensions and offsets defined as constants. The code renders directly to SVG elements inside a React `<g>` group, combining D3’s shape calculations with React’s component model.