An animated smiley face with moving eyebrows, rendered as SVG via D3.js, demonstrates fundamental DOM manipulation. The face is built using basic D3 shapes—circles, rectangles, and an arc-generated mouth—positioned within a centered group. The eyebrows transition vertically through chained `transition().duration()` calls, creating a repeating bobbing effect. Additional elements include ears, hair, and teeth, all styled with simple fill and stroke attributes. The code imports `select` and `arc` from D3 v5 to construct the geometric components and drive the animation.