This example visualizes the top 10 most populous countries by 2020 estimates using a horizontal bar chart rendered with SVG and React. The chart includes styled axes with tick marks and a labeled "Population" axis, while each bar displays a tooltip with formatted population values (e.g., "1.44B") on hover. The code builds the chart using D3 v5 functions such as `scaleBand` for the categorical y-axis, `scaleLinear` for the numerical x-axis, and `format` for tick labels. Data is loaded asynchronously from a CSV file via `d3.csv` and filtered to the top ten rows.