This stylized bar chart displays the top 10 most populous countries using data from the United Nations World Population Prospects 2019. The visualization uses horizontal bars with a teal fill and Poppins font, with population values formatted as billions and tooltips showing exact numbers. Built with React and D3 v5, the chart employs `scaleBand` for the categorical y-axis and `scaleLinear` for the population x-axis, rendering SVG rectangles via custom `Marks` components. The axes are constructed using `AxisBottom` and `AxisLeft` components, with data loaded asynchronously via D3's `csv` function.