This example demonstrates a minimal React application that renders a static text message, “Hello React,” centered on a plain white page. It shows a basic integration of the React and ReactDOM libraries within an HTML document, using the `ReactDOM.render` API to mount the component into a root `<div>` element. The page loads React 16.7.0 and ReactDOM 16.7.0 from unpkg, along with D3 v7.0.1, although this code does not invoke any D3 functions. The styling sets the body font size to 13em, producing oversized text that fills the screen.