This example draws a simple geometric face in an SVG canvas using D3 v5. It constructs a yellow circle as the head, two smaller circles for the eyes, and a mouth created with D3’s `arc` shape generator. The code uses `select` and `append` from the D3 API to build the SVG hierarchy, positioning elements relative to a centered group. The face is rendered purely through SVG primitives with no external data source, focusing on basic shape composition and coordinate transforms.