This example displays a static SVG ellipse with a red-to-green radial gradient beneath a bold “Hello React!” message. The React component renders the text via `ReactDOM.render`, while the gradient is defined directly in the HTML using SVG’s `radialGradient` and `stop` elements. The code uses React 16.13.1 from unpkg and separates the visualization markup from the React app logic, though no interactive data or dynamic updates are present.