This horizontal bar chart displays the 2020 populations of up to 30 countries, with bars sorted by country name along the y-axis and population values on the x-axis. The visualization uses React and D3 v5, leveraging `scaleBand` and `scaleLinear` to map data, SVG rectangles for the marks, and axis components that render ticks and labels. Population values are formatted using D3’s `format` function, converting large numbers to compact “B” (billion) notation for tick labels and tooltips. Data is loaded from a remote CSV file via `d3.csv`.