This example demonstrates the simplest possible D3 version 7 setup: a blank page that writes the text "Hello D3 version 7" into the body element. The visualization uses the `select` function from the D3 library to target the body and the `.text` method to set its content. The page loads D3 v7.6.1 from a CDN and runs the script from a separate `bundle.js` file. No data source or rendering is involved beyond this direct DOM manipulation.