This 3D bar chart visualizes car manufacturer sales data for the first six months across multiple years (2016–2021), sourced from a CSV file. The visualization uses D3.js v5 with the d3-x3d library and the x3dom engine to render the bars as interactive 3D objects in the browser. The code leverages D3’s `csv` loader, `scaleLinear`, `extent`, and axis utilities (`axisLeft`, `axisBottom`), while the `d3.x3d.chart.barChartMultiSeries()` component manages the multi-series bar layout. Data is parsed and attached to the chart holder using the `datum` and `call` methods.