This bar chart displays the population of the top 20 countries in 2010, ranked by country name on the vertical axis and population count on the horizontal axis. Built with D3 v5 within a React framework, it renders as an SVG. The chart uses D3's `scaleBand` and `scaleLinear` for axes, utilizes `csv` to load data from a GitHub repository, and formats tick labels with `format`. Hovering over a bar reveals a tooltip with the population value.