This pie chart visualizes product sales distribution, with each slice sized proportionally to its revenue share and a corresponding legend displaying category names and percentage values. The chart uses d3.pie and d3.arc to generate the SVG paths, with a scaleOrdinal color scale assigning distinct hues to each segment. Data is loaded asynchronously from a CSV via d3.csv, and percentage labels are formatted with d3.format. The total sum of all values is calculated to compute each category’s share.