A bar chart displays population density for select European Union countries, highlighting Malta as the most densely populated. Built with D3 v5, the visualization renders as SVG, using `scaleBand` for horizontal positioning and `scaleLinear` for vertical density scaling. Data from a CSV file is mapped to rectangular bars, which turn interactive through mouseover events that log country names. Axis generators `axisLeft` and `axisBottom` provide reference grids, while the chart title and margins organize the layout.