This line chart displays temperature readings in San Francisco over time, with time on the x-axis and temperature on the y-axis, using a smooth curve. The visualization is rendered as an SVG using D3 v5, and loads its data from a CSV file via `d3.csv`. The code employs `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.line` with `curveBasis` to construct the chart, and includes a custom `getData` function that resolves the dataset after a delay.