A D3.7 area chart visualizes the average electric vehicle range in miles per model year from a CSV dataset. Using `d3.csv`, `d3.autoType`, and `d3.rollups`, it aggregates rows by year, computes the mean `AvgRangeMi`, and sorts chronologically. The chart employs `d3.scaleLinear` axes, a monotone-curve `d3.area` generator, and a steelblue semi-transparent SVG path. X and Y axes with labels are rendered via `d3.axisBottom` and `d3.axisLeft`, all drawn within an SVG canvas.