This stylized bar chart visualizes the top 10 most populous countries using horizontal bars, where bar length encodes population magnitude. Built with React and D3 v5, it employs a `csv` loader to fetch United Nations World Population Prospects 2019 data, then uses `xScale` and `yScale` from `d3.linearScale` and `d3.bandScale` to map values. Custom `AxisBottom` and `AxisLeft` components render ticks, while `Marks` draws rectangles with tooltips showing precise populations, styled with a teal fill and muted gray axis lines.