This horizontal bar chart displays the populations of ten countries for the year 2000, sorted by country name. Built with React and D3 v5, it renders as an SVG using `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis, with formatted tick labels converting large numbers to billions. Data loads from a CSV via D3's `csv` function, and bar tooltips show the exact population value in abbreviated format.