This example renders a yellow smiley face built from reusable React components, including a circular background, two eyes, and an arc-based mouth. The face is centered within an SVG container using a translated `<g>` element. The code uses React 17 and D3 v6, with the mouth path generated via the `d3.arc()` API. The visualization is static, but the component-based structure allows easy customization of facial features and dimensions through props.