A bar chart displays the population of the first 10 countries from a dataset for the year 2000. The visualization uses D3.js version 7 to load CSV data from a remote gist, filter it by year, and render SVG bars with a steelblue fill that turns orange on hover. The code constructs a band scale for country names on the x-axis and a linear scale for population on the y-axis, with tick labels rotated for readability.