This example demonstrates a minimal React application that renders a centered “Hello React!” message using the React and ReactDOM libraries. The code defines a simple App component returning a div with a large font size and text alignment styled via CSS. ReactDOM.render mounts the component into the root div. The setup includes production builds of React 16.13.1 loaded from unpkg, with a placeholder object for a red rose that is not used. No data visualization or external data source is present.