This bar chart displays the populations of twenty countries in 2010, using a horizontal layout with country names on the y-axis and population values on the x-axis. Built with React and D3 v5, the visualization uses `scaleBand` for the categorical axis and `scaleLinear` for the numeric scale. Rectangles render the bars, with `format` for tick labels that abbreviate large numbers. Data loads from a CSV file via `csv`, and tooltips appear through SVG `<title>` elements.