This example uses D3.js to construct a smiling face with moving eyebrows, demonstrating fundamental DOM manipulation. The code selects an SVG element with `d3.select` and applies a pink background via `style`. The face itself is drawn through D3's data-binding and attribute-setting methods, with the eyebrows animated to convey expression. The visualization renders in a 960-by-500 SVG using D3 v5, emphasizing core selection and styling operations rather than complex data handling.