This bar chart displays the populations of the top five most populated countries, scaled in millions. Built with D3 v5, it renders as an SVG using `d3.scaleLinear` for the x-axis, `d3.scaleBand` for the categorical y-axis, and `d3.scaleOrdinal` for country-specific colors. The data comes from the United Nations World Population Prospects 2019, loaded via `d3.csv`, with axes and tick formatting generated through `d3.axisBottom` and `d3.axisLeft`.