This bar chart visualizes the 2018 population estimates for the top 10 most populous countries, sourced from the United Nations World Population Prospects. The chart uses a linear x-scale and band y-scale, with axes customized through `axisLeft` and `axisBottom`, including tick removal and formatting. Rectangles are colored with a sequential viridis scale via `d3.scaleSequential` and `d3.interpolateViridis`. Data is loaded from a CSV using `d3.csv` and rendered in an SVG element. Axis labels and a title are added as text elements.