This example displays the text "Hello D3" centered on a blank page, rendered at an enormous font size of 14em. The visualization serves as a minimal starter template, demonstrating the basic setup for a D3 project using an import map to load d3.v7. The code uses the `select` function from the 'd3' module to target the body element and applies the `text` method to inject the greeting. No data source is used, and the rendering approach is purely DOM-based text output.