A smiley face rendered as a static SVG using React and D3, composed of a yellow circle face, two black eye circles, and a D3-generated mouth arc. The example demonstrates how React manages SVG elements while D3’s `arc` API defines the mouth’s path geometry. The face is centered via a `translate` transform, with fixed dimensions and stroke properties set in code. This simple composition highlights the integration of React’s declarative components with D3’s shape generators for precise path calculations.