A pie chart displays the distribution of job titles from a CSV dataset, showing each title’s count as a labeled slice. D3 v7 loads the data with `d3.csv`, aggregates counts using `d3.rollup`, and renders pie arcs via `d3.pie` and `d3.arc`. Each slice is colored with `d3.scaleOrdinal` and `d3.schemeCategory10`, with labels placed at arc centroids. An HTML legend lists each title with a matching color swatch. The SVG output is sized at 600 by 600 pixels.