This example shows a smiley face built from SVG shapes, with a yellow circle for the head, two black eyes, and a curved mouth drawn as an arc. The face is centered in a 960x500 viewport, with the mouth rendered using D3’s `arc()` generator with specified inner and outer radii and start/end angles. The visualization is implemented in React, using ReactDOM to render the SVG tree, while D3 v7 provides the arc path calculation. Each element is positioned via SVG coordinates and a translate transform.