A horizontal bar chart displays the population of the first ten countries from a CSV dataset for the year 2000. The chart uses light green bars that darken on hover, with axis ticks and labels styled in gray. Built with React and D3 v5, the visualization uses D3's `scaleLinear` and `scaleBand` for scales, `svg` for rendering, and `format` to abbreviate tick labels, converting 'G' to 'B' for billions.