This scatter plot compares the area and population density of world countries, with each point colored by continent and labeled with a tooltip showing population, area, and density. The visualization is built as a reusable D3 function, using `d3.csv` to load `world_population.csv`, `d3.scaleLinear` for axes, `d3.scaleOrdinal` for colors, and `d3.symbol` for point shapes. The chart includes axis caps, a legend, and hover tooltips, rendered as SVG with smooth transitions.