A smiley face drawn with React and D3's `arc` generator renders in SVG, combining geometric shapes for the head, eyes, pupils, and a purple nose. The face uses D3's `arc()` API for the mouth arc, while React handles the component structure and JSX. A hairline path strokes downward from the top, and the face is centered with a transform. D3 v5 and React 16.9 work together, with visible `fill-opacity` and `stroke-width` attributes on the SVG elements.