This is a refactored bar chart visualizing the top 10 most populous countries from the United Nations World Population Prospects 2019 dataset. The chart shows horizontal bars representing each country’s population, with axes on the bottom and left. Built with React and D3 v5, the code uses reusable components (AxisBottom, AxisLeft, Marks) that leverage D3’s scaleBand and scaleLinear to position bars and ticks, rendering everything as SVG elements within a React component.