This example displays the simple text “Hello React!” on a blank canvas. It starts a React application within a minimal HTML page, using React and ReactDOM (specifically `ReactDOM.render`) to mount a functional component into a root `div` element. The visualization relies on the unmodified React 16.9.0 and its DOM library, alongside D3 version 5.11.0, though no D3 functions are invoked in the provided code. The approach demonstrates the foundational integration of React as a rendering layer for a web-based visualization environment.