This example shows a simple animated face built with SVG shapes, including a pink circle head, brown eyes, and a mouth created using an SVG arc path. A group containing the eyebrows transitions vertically up and down in a repeating two-second cycle. The code uses D3 v6 selections and the `d3.arc` helper to generate the mouth path, with SVG attributes for positioning and styling. Rendering is entirely in SVG with D3 transitions driving the eyebrow animation.