A horizontal bar chart displays the top 10 most populous countries from the United Nations World Population Prospects 2019 dataset. Bars extend left-to-right proportional to 2020 population estimates, with country names on the y-axis and formatted tick labels on the x-axis. React renders SVG marks and axes, while D3 v5 scales (`scaleBand`, `scaleLinear`), `max`, `format`, and `csv` handle data loading and layout. CSS customizes tick lines, text, and bar colors, with a Poppins font family.