This area chart visualizes a week of temperature data in San Francisco, using time on the x-axis and temperature on the y-axis. The chart is rendered as an SVG using D3 v5, with an orange area fill and purple stroke. The code leverages D3's `scaleTime`, `scaleLinear`, `area`, and `curveBasis` APIs to generate the smooth area path. Data is loaded from a CSV file via `d3.csv` and parsed into a date and numeric temperature value.