This visualization displays the distribution of Iris flower species as a pie chart, with each slice representing the count of observations per species. The chart is generated using D3.js v6, employing the `pie()` layout and `arc()` generator to compute and render the slices, while `d3.rollup` aggregates the dataset by species. A legend and axis labels are included, rendered as SVG elements, and the chart reads from a remote CSV file containing the Iris dataset.