This example shows a simple yellow cartoon face built from SVG shapes in a 960×500 viewport. D3.js (v3) appends a large yellow circle for the head and two smaller black circles for the eyes, then positions a mouth path using the `d3.svg.arc` API with an inner and outer radius. All elements are selected via `d3.select` and placed relative to the SVG width and height attributes, with eye spacing and offset defined as numeric constants.