This visualization shows the distribution of employees by role using a pie chart, with each slice labeled and a legend displaying role names and employee counts. The chart is built with D3 v7, using `d3.pie` and `d3.arc` to generate the slices and `d3.scaleOrdinal` with `schemeTableau10` for colors. Data is loaded from a remote CSV file via `d3.csv`, aggregated with `d3.rollups`, and rendered as SVG elements with the `enter` selection pattern.