This example illustrates how to construct a cartoon face using basic D3.js shape primitives. It renders a yellow circular head with black stroke, two eyes, and a smiling mouth as a path generated by the `d3.arc()` generator. The code selects an SVG element and uses `d3.select` to append groups and circles, positioning them via `translate` transforms. The mouth arc uses fixed inner and outer radii with defined start and end angles, demonstrating a composable approach to SVG drawing with D3 v5.