This example shows a yellow smiley face rendered as an SVG, with two black eyes and a curved mouth arc, though it omits the mouth’s stroke width for a partially completed look. The visualization uses React to construct the SVG elements, while D3’s `arc` generator creates the mouth path based on inner and outer radii and angular start and end points. The face is centered using fixed coordinates, with eye positions offset from the center and a black stroke outlining the head.