This example shows a horizontal bar chart of population figures for the world’s most populous countries, using a CSV data source loaded with d3.csv. The visualization maps each country’s population to bar width via a d3.scaleLinear domain and a d3.scaleBand for categorical country labels, with axes generated by d3.axisLeft and d3.axisBottom. The chart renders as SVG inside a React application, with bars styled steelBlue and formatted using D3 v5.