This bar chart visualizes population figures for the top 10 countries, sourced from a 2019 UN Population CSV. Rendered as an SVG within a React component, it constructs the chart using D3 v7's `scaleBand` and `scaleLinear` for the axes and bars. The refactored code separates the axes and marks into dedicated files, passing them as components to the main `App`, which applies a cursor-following pattern.