This refactored bar chart displays the top 10 countries by population from a 2019 UN dataset, using horizontal bars with a yellow circular background. The visualization is built with React and D3 v7, employing `scaleBand` for the categorical y-axis, `scaleLinear` for the quantitative x-axis, and rendering SVG rectangles via the `Marks` component. Axes are constructed with explicit D3 tick and domain mappings, while the `useData` hook fetches and parses CSV data with `d3.csv`, converting population strings to numbers for the initial loading state.