This example shows a smiling face constructed from SVG primitives, with a yellow circular head, two black eyes, and a curved arc for the mouth. The drawing is built declaratively in React, where each facial feature is a separate component that receives numeric parameters like radius and offset. The mouth uses the D3 `arc` generator to create a path with an inner and outer radius, while the face is centered inside an SVG canvas using a translation transform. The code defines constants for all dimensions and positions, then passes them to the components to render the final composition.