This example demonstrates a simple cartoon face built entirely with SVG shapes using D3.js v6, displaying a yellow circular head, black eyes, rectangular eyebrows, and a curved mouth. The code uses D3 selection methods to append and manipulate SVG elements, including `circle`, `rect`, and `path` nodes, within a centered group. The mouth is created using D3's `arc` generator with specified inner and outer radii and angles. Dimensions are read directly from the SVG attributes and converted to numbers for positioning the face components.