This bar chart showing population by country for the year 2010. The top of the chart lists the countries on the y-axis, while the x-axis shows the population value in millions. The bars are rendered with a steel blue fill color. The chart is built using D3.js v7, which uses data from the `data.csv` file. The code uses `d3.scaleLinear` and `d3.scaleBand` to map quantitative and categorical data, `d3.axisLeft` and `d3.axisBottom` to create the axes, and `d3.format` to add abbreviated tick labels.