A yellow smiley face rendered in SVG uses React components to draw a filled circle with a black stroke, two eye circles, and a mouth arc. The mouth is generated with D3’s `arc` function, which computes a path based on inner and outer radii and start/end angles. The layout positions elements via a centered group and fixed offsets, with dimensions and stroke width defined as constants. This example demonstrates combining React’s declarative structure with D3’s shape generators for simple static graphics.