This area chart displays hourly temperature readings in San Francisco over time, with a smooth green curve filled to a baseline. D3 v5’s `scaleTime`, `scaleLinear`, and `area` generator with `curveBasis` produce the waveform, while `axisBottom` and `axisLeft` add labeled, grid-lined axes. The data is loaded as CSV from a remote dataset, parsed into timestamps and numeric values, and rendered as an SVG path with custom tick and title styling.