This example shows a stylized yellow face with eyes, eyebrows, and a sad mouth drawn as SVG shapes. The eyebrows animate upward and then back down over two seconds, creating a subtle emotional expression. The code uses D3 v7 selections and transitions, importing `select` and `arc` from the D3 module. The mouth is rendered using the `arc` generator with specified inner and outer radii and angles, while the SVG canvas is set to 960 by 500 pixels.