This horizontal bar chart displays the population of 20 countries in 2010, ordered by country name along the y-axis and population magnitude along the x-axis. Built with React and D3 v5, it uses `d3.scaleBand`, `d3.scaleLinear`, and `d3.max` to map the data from a remote CSV file, while `d3.format` converts tick labels to abbreviated "B" for billions. The SVG rendering includes custom axis components and rectangle marks with tooltips showing each value, styled with green fills and blue tick lines.