This line chart shows temperature trends in San Francisco over time, with the x-axis representing time and the y-axis representing temperature. The visualization is rendered as an SVG using D3 v5 and the `d3.select`, `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.line` APIs. Data is loaded from a CSV file, and the line is smoothed using `curveBasis`. Axis grid lines are styled, and titles and labels are added.