A yellow SVG face with eyes, animated eyebrows, and an arc-shaped mouth is rendered in the center of a 960×500 viewport. The example demonstrates how to compose primitive shapes with D3 selections and apply a chained transition to move the eyebrow group vertically over two seconds, then return it. It uses `d3.select`, `d3.arc`, and `transition.attr` on SVG elements, with D3 v7 loaded from UNPKG and a local ES6 module importing `select` and `arc`.