A smiley face rendered in React and SVG combines a yellow circular head with layered, colorful eyes and a wide grin. The composite facial features are assembled from separate React components—`Eyes` and `Smile`—which contain hand-coded SVG ellipses, paths, and circles with CSS classes for color fills. The main `App` component positions and scales these parts using inline SVG `<g>` transform and translate attributes, producing a static vector illustration.