This visualization displays the ten most populous countries as horizontal bars, with no axes or labels, scaled proportionally to their 2020 population estimates from the United Nations World Population Prospects 2019 dataset. The React app fetches CSV data using d3.csv, then uses d3.scaleBand for the y-axis positioning and d3.scaleLinear with d3.max for the x-axis scaling. Each country is rendered as an SVG rectangle element within a fixed 960x500 canvas, with a simple loading message shown before data arrives.