A bright yellow smiley face is drawn in SVG using D3 v5. The code selects an SVG element and builds the face by appending a circle for the head, two black circles for the eyes, and a path for the mouth. The mouth path is generated with the D3 `arc` generator, using an outer radius and angles to create a half-circle shape. The face is centered via a group transform, with eye spacing and vertical offsets applied to position the features.