A horizontally oriented bar chart displays population figures for the ten most populated countries, using data loaded from a CSV file. The chart is rendered as SVG within a React application, employing D3 v5 APIs such as `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom`. A custom tick format converts large numbers into abbreviated billions, while grid lines and axis labels enhance readability. The bars are populated via D3’s selection and data-binding methods.