Making a Bar Chart
This bar chart visualizes the top 10 most populous countries using 2018 population estimates from the United Nations World Population Prospects. It demonstrates customization of D3 axes, using `d3.scaleLinear` for the x-axis and `d3.scaleBand` for categorical country labels. The SVG rendering approach draws rectangles with steelblue fill, while axes are generated via `d3.axisLeft` and `d3.axisBottom`. The chart is built with D3 v5 and includes a tutorial video for reference.