This example renders a stylized smiley face using React and D3.js v7, drawing all elements as SVG primitives within a 960×500 viewport. A large white circle with a thick black stroke forms the head, while two eyes (each containing a green circle and purple center), eyebrows, and straight hair-line strokes are positioned symmetrically around the center. D3’s `arc` helper generates the mouth as a semi-circular path between π/2 and 3π/2 radians, with an inner radius of 130 and outer radius of 150. All geometry is defined through inline SVG attributes, with React handling the declarative component structure and D3 providing the arc path data.