This example draws a cartoon face with D3.js, composing a yellow circle for the head, two eyes, two eyebrows, and a curved mouth as a path. The code uses the `d3.select` API to target the SVG element, `append` to build shapes, and `d3.arc` to generate the mouth’s arc geometry. Positioning relies on explicit `transform` attributes, centering the face and offsetting features relative to the SVG’s dimensions. The rendering uses SVG primitives within a React starter setup, keeping the visualization simple and declarative.