This line chart visualizes temperature readings over a week in San Francisco, using time on the x-axis and temperature on the y-axis. The data is loaded from a CSV file and parsed into date and numeric values. The visualization is built with D3 v5, using `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and a `line` generator with a `curveBasis` curve. SVG is rendered with gridlines and labeled axes, while a styled path connects the data points in steelblue.