This line chart visualizes one week of temperature data in San Francisco, using a filled area under the curve to emphasize temperature variation over time. The chart includes labeled axes for time and temperature, with grid lines and a title. It loads CSV data from an external URL, parses timestamps and numeric temperatures, and renders the visualization using D3 v5’s `scaleTime`, `scaleLinear`, `area`, `axisBottom`, and `axisLeft` APIs. The SVG output displays a maroon area path over a clean white background.