This example demonstrates fundamental DOM manipulation with D3.js by constructing a smiley face from SVG shapes, including a gold circle face, two black eyes with lightblue outlines, and a brown-stroked mouth drawn using the d3.arc() path generator. The face is centered within a 960×500 SVG canvas, with eye positions calculated relative to the canvas dimensions. The code uses d3.select() and chained .attr() methods to create and style each element, while a group element with a transform attribute aligns the mouth correctly.