This example demonstrates how to initialize a D3.js version 7 project and load a CSV dataset for hierarchical analysis. The page displays "Hello D3 version 7" as static text, while the accompanying code uses `d3.csv` to fetch and parse `flare.csv`, which contains vulnerability count data across business units and system types. The parsed data is then fed into a `d3.stratify()` function that transforms it into a nested hierarchy, though the resulting structure is only logged to the console rather than visualized. The implementation relies on the D3 selection API (`d3.select`) and a bundled JavaScript file.