This example visualizes temperature readings over time using a smooth line chart, with time on the x-axis and temperature on the y-axis. The data comes from a CSV file containing weekly San Francisco temperature records. The visualization is built with React and renders to SVG, using d3.scaleTime and d3.scaleLinear for the axes. d3.line with curveNatural draws the path, while the axis components generate ticks and labels. Tooltips are commented out in the Marks component.