This example draws a smiling face in SVG using D3.js, composing a yellow circle for the head, two black circles for eyes, rectangles for eyebrows, and an arc-based path for a mouth. The rendering approach relies on D3 selections and the `arc` generator from D3’s shape module. The right eyebrow animates upward and returns to its original position using chained `transition().duration()` calls over two seconds each, while all other elements remain static. The face is centered at (480,250) on a 960×500 SVG canvas.