This example displays an area chart that visualizes the relationship between height (in feet) on the x-axis and the number of people on the y-axis. The code loads a CSV dataset from a GitHub URL using d3.csv, parses numeric fields, and renders an SVG chart with linear scales for both axes. A gradient-filled area path is generated using d3.area, with axis labels added via d3.axisBottom and d3.axisLeft. The visualization uses D3 v7 and custom CSS styling for the chart container.