This pie chart shows the distribution of countries across regions from a mental health dataset, displaying the count of countries in each region as labeled slices with a corresponding legend. The visualization uses d3.csv to load the data, d3.rollup to aggregate country counts by region, and d3.pie with d3.arc to generate the pie geometry. Labels are positioned inside each slice using labelArc centroids, while a separate legend group lists each region with its count. The SVG is rendered in a plain HTML page with D3 v7, using a categorical color scale (d3.schemeCategory10) to distinguish regions.