This example demonstrates how to build a simple cartoon face using D3 version 6’s selection and shape APIs. The SVG output shows a yellow circle for the head, two eyes, eyebrows as rectangles, and a mouth drawn with the `d3.arc` shape generator. The code uses `select` and `attr` to position elements relative to the SVG center, while the arc’s inner and outer radii define the smile. No external data is loaded; all shapes are hardcoded in JavaScript.