A horizontal bar chart displays population figures for ten countries in the year 2000, using green bars with blue axis ticks and tooltips showing formatted values. The visualization is built with React and D3 v5, using `scaleBand` for the categorical country axis and `scaleLinear` for the numeric population scale. Data is loaded asynchronously from a CSV file via `d3.csv`, with population values multiplied by 1000 during preprocessing. SVG rendering handles the marks and axes, with tick formatting converting values into billions using D3's `format` function.