This bar chart displays the ten most populous countries, with each bar’s length proportional to its population. The visualization uses D3 v5, loading data from a CSV file sourced from the United Nations World Population Prospects 2019. It employs `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to position and label the bars, with population values formatted as billions using `format`. The chart is rendered as an SVG, with custom styling for bars and text.