A yellow smiley face with black-outlined circular eyes and a d3.arc-generated open mouth is rendered as SVG. The React component builds a single `<svg>` with a `<g>` transform for centering, using fixed numeric constants for eye offsets, eye radius, and mouth thickness. Blue-teardrop-shaped closed eyes are added via an SVG path element, positioned relative to the eye coordinates. D3 v5 provides the `arc` generator, while React 16.9 manages the DOM structure.