Fork of Smiley Face Part III
A React and D3 smiley face is drawn entirely with SVG shapes. The circular face, two eyes, and a curved mouth are built from basic SVG elements, with the mouth path generated using the D3 `arc` generator. The component uses React to render the SVG tree and imports the `arc` function from the `d3` library to compute the mouth’s path geometry, replacing static SVG markup with dynamic, code-driven shape construction.