This visualization displays the top 10 most populous countries as a simple bar chart without axes or labels, using United Nations World Population Prospects 2019 data. It loads the CSV via d3.csv, then uses React hooks to manage state and render SVG rectangles positioned with d3.scaleBand and scaled with d3.scaleLinear. The chart highlights the margin convention by reserving a large right-side space, leaving the bars to occupy only the left portion of the canvas.