This bubble chart visualizes the relationship between age and BMI for roughly 500 individuals, with color encoding gender. The SVG rendering uses d3.scaleLinear for both axes and d3.scaleOrdinal with a custom color range to distinguish male and female data points. The code loads data from a CSV via d3.csv and positions circles using xScale and yScale. A d3-legend legend is added for gender, and both axes are generated with d3.axisBottom and d3.axisLeft.