This example displays the text "Hello React!" centered on the page, with a static SVG ellipse below it that uses a radial gradient transitioning from transparent yellow to semi-transparent red. The visualization combines React 16.13.1 for rendering the DOM message via `ReactDOM.render`, while the SVG element defines its gradient using `<radialGradient>` and `<stop>` elements. No interactive behavior or data binding is present; the SVG is purely declarative markup embedded directly in the HTML file.