This example displays multiple smiley faces rendered as React components, each built from reusable SVG parts for the background circle, eyes, and mouth. It demonstrates component composition and parameterization, varying face size, stroke width, eye radius, and mouth dimensions across instances. The faces are generated using D3’s `range` function to create ten iterations, while the mouth shape relies on D3’s `arc` generator with specific start and end angles. The SVG output is produced through React’s declarative rendering, with a `FaceContainer` managing the central translation transform for each face.