This example shows a horizontal bar chart of the top 10 most populous countries in 2019, sourced from a CSV file. It uses React components to render SVG marks and channels, with D3 v5 handling data loading via `d3.csv`, scales (`scaleBand`, `scaleLinear`), and axis tick generation. The chart encodes country names on the y-axis and population values on the x-axis, with grid lines and labeled axes.