This bubble chart visualizes the relationship between GDP (x-axis) and population (y-axis) for six countries, with circle area encoding land area and color distinguishing each country. Built with D3.js v7, it uses `d3.scaleLinear` for the axes, `d3.scaleSqrt` for bubble sizing, and `d3.scaleOrdinal` with the Tableau10 scheme for colors. Tooltips generated via SVG `<title>` elements display each country’s exact values. The data is loaded from a local CSV file using `d3.csv`.