This data visualization example shows a horizontal bar chart displaying the populations of the ten most populous countries, using data from the UN Population 2019 CSV file. The chart is constructed using React components to render SVG elements, with D3 utilities (d3.csv, scaleBand, scaleLinear, max) handling data loading and scales. The code separates concerns into distinct functional components—AxisBottom, AxisLeft, and Marks—each receiving scale and data props. The axes and rectangles are rendered as SVG elements based on the population values from the "2020" column.