This doughnut chart displays the share of total tasks completed by each department—Engineering, Marketing, and HR—in the employee productivity dataset. Slices are sized proportionally to aggregated task counts, with percentage labels positioned at each arc’s centroid and a legend showing absolute values. The visualization uses D3 v7’s `d3.csv`, `d3.rollup`, `d3.pie`, and `d3.arc` to process data and generate SVG paths, with a pastel teal, purple, and blue color scale.