A bar chart displays the percentage of height and weight measurements for eight blocks in Palghar, India, with bars colored on a red-yellow-green scale. A dropdown menu lets users switch between the two measurement types, though the change handler currently only logs the selection. The visualization uses D3 v5 with scaleSequential and interpolateRdYlGn for color encoding, scaleBand for x-axis positioning, and scaleLinear for the y-axis. Data is loaded from a CSV file, and results are rendered as SVG.