This example displays the top 10 most populous countries as a horizontal bar chart, with country names on the y-axis and population counts on the x-axis. The React app loads United Nations World Population Prospects 2019 data via `csv`, then uses `scaleBand` and `scaleLinear` to position bars. SVG rectangles render the marks with tooltips, while custom `AxisBottom` and `AxisLeft` components draw tick lines and labels using D3's scale methods.