This example demonstrates fundamental DOM manipulation with D3.js by building a smiley face from SVG shapes: a yellow circle for the head, two black circles for eyes, and an arc-generated mouth. The code uses D3 selections, `svg.append`, and the `arc` generator from the d3-shape module to construct the face. The face is static, with no interactive behavior or animations, and the rendering approach relies on SVG elements within a 960-by-500 viewport.