This example renders a classic smiley face entirely in SVG. A large yellow circle forms the head, with two smaller dark circles for eyes and a pink blush on each cheek. A curved mouth is drawn using D3’s `arc` generator with specified inner and outer radii and angular ranges. The visualization is built with React components that compute layout constants for positioning, and it relies on ReactDOM to mount the SVG into the page using D3 v7 syntax.