This area chart displays temperature readings from San Francisco over time, loaded from a remote CSV file with D3’s `csv` function. The x-axis uses a time scale via `scaleTime`, while the y-axis uses a linear scale with `scaleLinear`. The filled region is generated with D3’s `area` generator, using `curveBasis` for smoothing, and rendered as an SVG path. Gridlines are drawn by configuring `axisBottom` and `axisLeft` with negative tick sizes. Interactive hover effects are not implemented; the visualization focuses solely on the static area representation.