This example uses React and D3 v7 to draw a smiley face in an SVG. The face consists of a yellow circle for the head with a black stroke, two black circles for eyes, and an arc for the mouth. D3’s `arc` generator creates the mouth path, while fixed pixel offsets and radius values position all elements relative to the center. The SVG is rendered by a React component using `ReactDOM.render`, with the figure centered in a 960×500 viewport.