This stylized bar chart displays the top 10 most populous countries using data from the United Nations World Population Prospects 2019. The visualization employs React with D3.js v5, rendering SVG elements through components like `AxisBottom`, `AxisLeft`, and `Marks`. The bar lengths encode population values using `d3.scaleLinear`, while countries are positioned along a `d3.scaleBand` axis. The chart applies a Poppins font and a custom color scheme, with formatted tooltips showing population values in billions.