This example demonstrates that D3 v7 functions can be used directly within an HTML page, where the body displays the static text "Hello HTML". The page imports D3 from a CDN and logs the `select` function to the console, while separate ES modules (`index.js`, `something.js`, `thing.js`) chain together to form and log the string "Hello A Planet Earth." The visualization highlights modular JavaScript composition and D3’s importability in a plain HTML context.