A grid of five stylized smiley faces demonstrates how D3.js v7 can assemble SVG shapes from local data. Each face uses circles for the head and eyes, rectangles for eyebrows, and an `arc()` path for the mouth, with its start and end angles adjusted per expression, such as happy or angry. Distinct decorative elements—ears, a beard, or hair—are conditionally appended to individual faces based on the data’s `expression` field, while transformations like `scale()` and `skewX()` modify the eyebrow geometry. The example imports `select` and `arc` from the D3 library, which is loaded via UNPKG, and renders entirely through SVG elements created dynamically.