A smooth, maroon area chart shows one week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis. The chart uses React with D3 v5, rendering as SVG, and builds the area shape with `d3.area` and `curveBasis`. Axes are generated via `d3.axisBottom` and `d3.axisLeft`, while scales come from `d3.scaleTime` and `d3.scaleLinear`. Data is loaded from a remote CSV file using `d3.csv`, with timestamps parsed into JavaScript `Date` objects for the time scale.