This bar chart displays the population of the top 10 most populous countries using 2018 estimates from the United Nations World Population Prospects. The code loads data from a CSV file and renders rectangular bars with an SVG, using d3.scaleLinear for the x-axis, d3.scaleBand for the y-axis, and d3.axisLeft and d3.axisBottom for the axes. The chart is built with D3 v5 and styled with steelblue rectangles.