This pie chart displays product inventory data, showing the sales units for each of the top ten products. Using D3.js v5, the visualization loads a CSV file, sorts the data by sales, and renders a pie chart with an accompanying legend that lists each product name and its unit count. The chart uses `d3.pie` and `d3.arc` for the pie segments, `d3.scaleOrdinal` and `d3.schemeCategory10` for color assignments, and SVG for rendering.</qa>