This example demonstrates a minimal React application that renders a simple "Hello" message. The code uses React and ReactDOM from the official UMD builds, with `ReactDOM.render` mounting a functional component to a `#root` element. The HTML page embeds a blank SVG container after the script tags, but no SVG content is generated. The example shows the basic structure of a React-based web app, where the UI is defined as a component and rendered into the DOM. The data source is static text, and the rendering approach relies on React's virtual DOM management.