This bar chart displays the top 14 countries by migration to the U.S., using data from the United Nations World Population Prospects 2019. The visualization uses React with SVG rendering, employing `d3.scaleBand` for the categorical y-axis and `d3.scaleLinear` for the numeric x-axis. Axis components are custom-built, with tick formatting via `d3.format` to convert raw values into abbreviated labels like "1.5B". Native SVG `<title>` elements provide tooltips on hover, while the Poppins font and custom styling give the chart its distinctive appearance.