Despite its title, this example shows a stylized face made from SVG shapes, not a traditional bar chart. A yellow circle forms the head, with two circular eyes, rectangular eyebrows, and an arc-based mouth. The eyebrows animate by transitioning their vertical position over two seconds, moving down and then back up. The visualization is built with D3 v5, using selections, the `arc` generator for the mouth, and chained `transition` calls for the animation.