This example demonstrates the simplest possible D3 version 6 setup: it renders the text “Hello D3 version 6” in the center of the page using a 13em font size. The code imports the `select` function from the `d3` module and calls `select('body').text(...)` to insert the string into the HTML body. The page loads D3 v6 from a CDN and references an external `bundle.js` script, which contains the imported JavaScript logic.