Smile 1
A yellow smiley face rendered as SVG, with a circular face, two black eyes, and a simple arc mouth. The visualization is built with React and D3, using the `arc` generator from D3 to construct the mouth path based on inner and outer radii and angular extents. The face and eyes are drawn as SVG circles, with the overall composition centered within a fixed 960-by-500 viewport. The example demonstrates combining React's declarative component structure with D3's geometry utilities for static, data-driven graphics.