This example shows the populations of the ten most populous countries using horizontal bars, with each bar’s length proportional to its population value. The chart reads from a CSV file listing country names and populations, sourced from the World Population Prospects 2017. It uses D3 v6’s `scaleLinear` and `scaleBand` to map data to pixel coordinates, and `axisLeft` and `axisBottom` to render the axes. Bars are drawn as SVG `rect` elements, styled with `fill: steelblue`.