This visualization displays the top 10 most populous countries as a horizontal bar chart, using data from the United Nations World Population Prospects 2019. It uses React for component composition and d3.v5’s `scaleBand`, `scaleLinear`, and `max` for scales and domain calculation. The chart renders as SVG, with axes constructed via custom `AxisBottom` and `AxisLeft` components, while `Marks` draws the rectangular bars. Data is loaded asynchronously with d3’s `csv` function and filtered to the first 10 rows.