This visualization shows tree height over time as a smooth area chart, with a blue filled region and a dark blue line tracing the trend across planting years. It uses D3 v7 to load a CSV dataset from a GitHub repository, parse the numeric values, and render the chart as SVG. The code applies d3.area and d3.line with curveMonotoneX for smooth transitions, plus d3.axisBottom and d3.axisLeft for the axes. The x-axis displays the year planted, while the y-axis measures height in meters.