A line chart tracks temperature over time in San Francisco, using a smooth curve to connect data points across a time-based x-axis and a linear y-axis. The chart includes labeled axes, a title, and grid lines to aid readability. Built with D3 v6, it uses `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and a `line` generator with `curveBasis`, rendering to SVG. Data is loaded from a remote CSV file via `d3.csv`.