This example constructs a cartoon face using D3.js v5 in a React environment, rendered as an SVG. It shows a yellow circle head with elliptical eyes, circular pupils, rectangular eyebrows, and an arc-based mouth, all positioned with absolute coordinates. The code uses D3 selections, `arc` for the mouth shape, and a `transition` to animate the right eyebrow moving downward. A static nose line completes the face, demonstrating basic SVG shape manipulation and animation without external data.