This example renders a smiley face in SVG using D3.v5. Two black circles form the eyes, and a yellow circle with a black stroke is the face. The mouth is drawn with a D3 `arc` generator, creating a partial ring path. The code relies on D3's `select` and `arc` functions, and the SVG dimensions come from the `width` and `height` attributes. All shapes are appended directly to the SVG canvas.