This example demonstrates how to construct a simple animated face using D3.js, with a yellow circular head, eyes, eyebrows, and a mouth drawn using `d3.arc`. The code renders the face as SVG elements within a React framework, using `select` and `arc` from D3 to build the shapes. A `transition` animates the eyebrows upward and back down repeatedly, creating a blinking or surprised expression. The face is centered within a 960x500 SVG canvas, with all geometry derived from hardcoded dimensions rather than external data.