A line chart depicts a week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis. The data is loaded from a CSV file using `d3.csv` and rendered as an orange area chart with a smooth curve via `d3.area` and `curveBasis`. Axes are created using `axisBottom` and `axisLeft`, with scales from `scaleTime` and `scaleLinear`. The SVG output includes labeled axes and a title, styled via CSS.