A smiling face is rendered as a static SVG graphic using D3.js. The code selects an SVG element, centers a group with a transform, and draws a yellow circle for the head with black circles for eyes. A mouth is created using D3’s `arc()` function to generate a path, specifying inner and outer radii and angular start/end values in radians. The example demonstrates basic SVG shape creation and coordinate transforms within a React-framework-compatible setup.