This area chart visualizes city and temperature data from a CSV file fetched at runtime. It uses D3.js version 7 to parse the weather dataset, scale bands for the x-axis, and linear scaling for temperature values on the y-axis. The `d3.area()` generator draws the filled path, while `d3.axisBottom` and `d3.axisLeft` render rotated city labels and measurement ticks. The SVG output includes custom margin-based layout and ordinal color encoding.