This bar chart displays the populations of 20 countries for the year 2010, sourced from a CSV file. The visualization uses an SVG canvas with a linear scale for population and a band scale for country names. The code employs d3.v7 APIs such as `d3.axisBottom`, `d3.axisLeft`, `d3.scaleLinear`, and `d3.scaleBand`, along with custom modules like `Marks.js` for drawing light green bars. The x-axis is labeled "POPULATION-2010", and the chart includes a title.