This interactive bar chart compares medical metrics between male and female patients, with a dropdown menu to switch the y-axis among five health indicators including Max Heart Rate, Resting Blood Pressure, and Cholesterol. Built with React and D3 v7, the visualization aggregates the CSV data by sex and renders average values as color-coded bars, using `d3.scaleBand` and `d3.scaleLinear` for positioning. Clicking a bar highlights that gender while dimming the other, and a legend identifies the male (steelblue) and female (pink) categories.