This example shows a smiley face built with D3.js, featuring yellow circular head, eyes, rectangular eyebrows, and a curved mouth rendered as an SVG path. The face is centered using SVG groups and transformations, with fixed numeric values positioning each facial feature. The code uses D3 v5 selections to append and style elements, the `arc()` generator for the mouth shape, and imports specific functions (`select`, `arc`) from the D3 module. Static positioning defines the layout, with no interactive or animated behavior included.