This bubble chart visualizes the correlation between height, weight, and age across multiple countries. Each circle's x-position represents height, y-position weight, and its radius encodes age, with color differentiating countries via a categorical turbo color scale. Built with D3.js v7, the SVG chart includes axes, a size legend for age, and interactive tooltips displaying country names on hover. The code utilizes `d3.scaleLinear`, `d3.scaleOrdinal`, and `d3.interpolateTurbo` to map data dimensions, with data loaded from a CSV file.