This bar chart displays the quantity sold for each product group, with horizontal bars sorted by category. The visualization uses D3 v7’s `scaleLinear` and `scaleBand` to map quantities to bar lengths and groups to vertical positions, respectively. Data from a CSV file is loaded via `d3.csv`, with string values converted to numbers. The SVG rendering includes axis labels, tick lines, and interactive hover titles showing exact values, styled with a custom gradient background and yellow bars.