Smiley Face Part 1
A simple yellow smiley face is drawn using D3’s `arc` generator to create the mouth, while React renders the SVG circles for the face and eyes. The face is centered at 480,250 with a black outline, and the eyes are positioned symmetrically using fixed offsets. The code uses `ReactDOM.render` with React 18 and D3 v7, specifying explicit pixel dimensions for the SVG canvas. No animation or interactivity is present; the example demonstrates static SVG composition with D3 path generation.