This interactive bar chart displays the percentage of height and weight for different blocks in the Palghar region, sourced from `data.csv`. Users switch between the two metrics via a dropdown menu, which triggers a smooth 1-second animation. Built with React and using D3.js, SVG rectangles and text labels are rendered and transitioned. The chart uses `d3.scaleLinear` for the y-axis, `d3.scaleBand` for the x-axis, and applies a sequential color scale (`d3.interpolateRdYlGn`) to encode values. A tooltip appears on hover, and the code uses `d3.csv` for data loading.