A horizontal bar chart displays the top ten countries by projected population for 2020, sourced from the World Population Prospects 2019 dataset. The visualization uses React with D3 v5, employing `scaleBand` for the categorical country axis, `scaleLinear` for the numeric population axis, and rendering SVG rectangles with hover tooltips. Population values are formatted in billions using D3’s `format` function, while axis ticks and labels are generated via reusable components.