This stylized bar chart displays the top 10 most populous countries using data from the United Nations World Population Prospects 2019. Population values are formatted with d3.format and rendered as horizontal SVG rectangles scaled by d3.scaleLinear and d3.scaleBand. The visualization is built with React components that encapsulate the axes and marks, while d3.csv loads and processes the dataset. The chart features a clean Poppins typography, light gray grid lines, and teal bars with native SVG tooltips.