A horizontal bar chart displays the populations of 20 countries in 2010, sorted by country name. The chart is built with React and D3 v5, using `scaleBand` for the y-axis and `scaleLinear` for the x-axis. Each bar’s length encodes population data loaded from a CSV via `d3.csv`, with axis ticks formatted using `d3.format`. SVG rendering includes interactive tooltips via `<title>` elements.