This scatter plot visualizes the relationship between age and weight from a synthetic health dataset. The visualization encodes each data point as a circle, with position determined by age on the x-axis and weight on the y-axis. The chart uses d3.scaleLinear for both axes and d3.axisBottom/axisLeft to render tick marks. The code colors points based on gender using d3.scaleOrdinal and includes a shapeLegend function that displays the color mapping. The data is loaded via d3.csv from a GitHub-hosted CSV file and rendered as SVG elements.