This example shows a partially constructed smiley face built with React and D3 v7, rendered as SVG shapes. The code draws a yellow circle for the head, adds two rotated ellipses for the eyes, and defines a mouth arc using D3’s `arc()` generator, though the mouth path is commented out. The face is centered via a transform, with fixed radius and offsets for facial features. No interactive behavior or data binding is present; it demonstrates static shape composition using React components and D3’s geometry utilities.