This example visualizes retail sales for the first six months of the year as an interactive 3D bar chart, with each retailer’s monthly figures grouped along separate axes. It uses the `d3.x3d` library to render X3D scenes, automatically creating a multi-series bar chart where the data is parsed from a CSV file via `d3.csv` and `parseRow`. The chart is embedded in an HTML page using D3 v5, with `d3.select` and `.datum().call()` to attach the data to the DOM element, and it leverages the `d3-3d` and `x3dom` libraries for the 3D output.