This example uses D3.js v7 to assemble a simple geometric portrait of a cat-like face from a set of polygons and circles. The code directly renders two triangular ears using `selectAll('polygon')` with specified coordinate points, then draws a white circular head with colored ear and eye details via `selectAll('circle')`. The SVG is generated dynamically, sized to its container, and styled with a solid background, demonstrating basic shape-data binding and join patterns.