A stacked horizontal bar chart shows the percentage of population in three age brackets—14 years and below, 15 to 64 years, and 65 years and above—across seven global regions. The SVG is built with D3 v7, using `d3.stack()` to compute the stacked segments, `d3.scaleLinear()` and `d3.scaleBand()` for positioning, and `d3.scaleOrdinal()` to assign categorical colors. Interactive tooltips reveal exact percentages on hover. Data comes from a CSV file, with axes labeled and a title displayed above the chart.