This horizontal bar chart displays the top 30 countries by 2020 population, with green bars extending from a shared baseline and blue tick marks along the axes. Built with React, the visualization uses D3 v5’s `scaleBand`, `scaleLinear`, and `format` utilities to map country names and population values to SVG rectangles, while the `csv` loader fetches data from a GitHub-hosted CSV file. Axis components render tick lines and labels, and hover tooltips reveal formatted population values via SVG `<title>` elements.