A simple D3 starter demonstrates the basics of rendering static SVG elements alongside a React app. The page displays a single yellow circle with a black stroke, drawn using an inline SVG element, while a React component renders the text "Hello" into a separate div. The code loads React and ReactDOM from CDN, uses JSX to define the component, and renders it with `ReactDom.render`. No D3 functions or dynamic data are involved; the example focuses on establishing the project structure.