This horizontal bar chart visualizes the 2010 populations of the first 20 countries from a CSV file, sorted alphabetically by country name. Built with React and D3 v5, it uses `scaleBand` and `scaleLinear` for the axes and renders SVG rectangles via the `Marks` component. Each bar’s length represents population, with tooltips showing formatted values (e.g., "1.37B"). The chart includes styled tick marks and axis labels, with population data multiplied by 1000 from the source.