This example uses D3.js v5 to construct a simple cartoon face from basic SVG shapes. It begins by creating a yellow circle for the head, then adds two black circles for eyes and an arc-generated path for the mouth. The `d3.arc` function computes the mouth’s curved shape based on specified inner and outer radii, with angles defined in radians. All elements are centered within the SVG using a translation transform, demonstrating how to combine geometric primitives and D3’s arc generator for expressive, code-driven visuals.