A smiling face is drawn as a yellow circle with a black outline, two eyes, and a curved mouth, all centered in an SVG. The visualization uses React to render the SVG elements, while D3’s `arc` function generates the mouth path based on inner and outer radii and start/end angles. Hard-coded dimensions and offsets position the facial features, with the face radius derived from the viewport height and stroke width. The example demonstrates combining React components with D3’s geometric utilities for declarative, static chart-like graphics.