This example shows the distribution of hypertension risk in a dataset, displayed as a pie chart with two categories: no risk (0) and risk (1). The chart uses D3.js v6 with an SVG rendering approach, loading CSV data from a GitHub gist. It employs d3.pie() and d3.arc() to generate the chart slices, with labels showing category names and counts. A color scale assigns distinct colors to each category, and a legend is generated dynamically from the same data.