This example shows a horizontal bar chart of population data for the top four countries from the UN Population 2019 dataset, rendered as SVG using React. The chart includes a linear x-axis with tick marks and labels generated by extracting ticks from `d3.scaleLinear` via `xScale.ticks()`, and uses `d3.scaleBand` for the categorical y-axis. Bars are drawn as `<rect>` elements, with widths proportional to population values, while axis lines and text are positioned using D3’s scale outputs within React components.