A smiling face rendered as an SVG in React uses d3’s arc generator to draw the mouth as a thick annular segment, with the face and eyes as simple circles. The component positions all elements relative to a central origin, computing radii and offsets in JavaScript rather than hardcoding coordinates. The d3.arc() API defines the mouth’s inner and outer radii and angular range, while React manages the SVG’s DOM structure. No external data is loaded; the graphic is purely procedural, with yellow fill and black stroke for the face outline.