A horizontal bar chart displays the populations of ten countries in the year 2000, using a d3.scaleBand for the categorical y-axis and d3.scaleLinear for the quantitative x-axis. The React components render SVG rectangles via the reusable Marks, AxisBottom, and AxisLeft modules, with axis ticks styled through CSS. Data is loaded as CSV using d3.csv, formatted with d3.format, and tooltips are provided by SVG title elements.