A yellow circle with a blue outline and two black eyes forms half of a smiley face inside an SVG. A curved mouth arc, drawn as a path, completes the lower portion of the face. The visualization uses React for rendering the SVG elements and D3's `arc` generator to compute the mouth path, with an inner and outer radius and start/end angles. The remaining shapes are simple SVG circles positioned with fixed offsets, all centered within a 960 by 500 viewport.