A yellow circle with a black outline forms a smiley face, flanked by two dark eye circles and a half-circle mouth arc drawn with a thick stroke. Built with React and the D3 arc generator, the SVG composition centers the face at the viewport’s midpoint, using D3’s `arc()` to define the mouth’s radius and angles. The example demonstrates translating D3 geometry into a React-rendered SVG via JSX, with fixed numeric dimensions.