This example demonstrates fundamental DOM manipulation with D3.js by creating a smiley face whose eyebrows move. The visualization uses D3 v5 selections and the `arc` generator to draw the face’s features, while the interactive animation is driven by data-driven updates. The SVG element is selected and sized from its attributes, with a CSV file providing the underlying data. The code illustrates how D3 binds data to visual elements and transitions them, resulting in a simple yet effective demonstration of dynamic SVG rendering.