This line plot visualizes temperature readings from a week in San Francisco, using a filled area chart to show the range of temperature over time. The data, loaded from a CSV file via `d3.csv`, is mapped to time and linear scales (`d3.scaleTime`, `d3.scaleLinear`), with axes generated by `d3.axisBottom` and `d3.axisLeft`. The area is rendered as an SVG path using `d3.area`, styled with a maroon fill, and includes labeled axes and a title.