A smiling face constructed from D3 shapes animates its eyebrows upward and downward in a repeating cycle. The yellow circular head, black-outlined eyes, and arc-based mouth are drawn as SVG elements using D3's `select`, `append`, and `arc` APIs. The face’s components are positioned via translation transforms, while the eyebrow motion relies on D3’s `transition` with a two-second duration. This React-framework example demonstrates animated SVG composition with D3 v5.