A smiley face rendered as a pure SVG graphic using React and D3. The face consists of a yellow circle with a black stroke, two black eye circles positioned symmetrically, and a mouth drawn as an arc path. The code uses React for component structure and the D3 `arc` generator to define the mouth's crescent shape, with explicit coordinates for eye offsets and radii. All shapes are created declaratively inside a single SVG element with a centered transform group.