This example demonstrates a React component that renders a simple SVG face with a yellow circle, two black eyes, and a black stroke. The code uses React and ReactDOM to mount an `<App />` component into a `#root` div, while the commented-out SVG markup shows the intended geometric shapes. The actual rendered output displays only the text "Hi," as the SVG code is not active. The example highlights how a React-based visualization can be structured, using standard SVG elements like `<circle>` with `cx`, `cy`, and `r` attributes, though the live demo currently shows no graphical output.