Smiley Face part 1
A yellow smiley face is rendered in the center of an SVG canvas, composed of a circular background with a black stroke, two eyes, and an arc-based mouth. The visualization uses React components to structure each facial feature, with D3’s `arc` API generating the mouth path from angular ranges. All elements are positioned via a central `<g>` transform, using fixed pixel offsets for the eyes and radii defined in the main App component.