A yellow smiley face with animated eyebrows is rendered in SVG using D3 v5. The code builds the face from primitive shapes—circles for the eyes, rectangles for the eyebrows, and an arc-generated path for the mouth—all positioned relative to a centered group. D3's `transition()` and `duration()` methods repeatedly shift the eyebrow group up and down over two-second intervals, creating a continuous bobbing motion. The example demonstrates core D3 selections and DOM manipulation without external data, relying solely on hardcoded dimensions and the `arc()` helper for the mouth shape.