This bar chart displays 2020 population estimates for 30 countries, sorted by country name on the vertical axis and proportional bar lengths on the horizontal axis. The visualization uses React components to render SVG elements, with d3.scaleBand and d3.scaleLinear handling the positional scales, while d3.csv loads the remote dataset. The code demonstrates a reusable axis and mark component architecture, with tooltips showing formatted population values via d3.format.