A bubble chart visualizes the correlation between population, area, and GDP for various countries. Each circle's x-axis position maps to population, its y-axis to GDP, and its radius to area, with color encoding the country. Interactive tooltips display the exact values for each country on hover. The visualization uses D3.js v7 with linear scales for all axes, an ordinal color scale for countries, and SVG for rendering. It also includes a legend for both area sizes and country colors, with hover effects increasing bubble opacity and stroke width.