This area chart visualizes temperature changes at Walmart from 2001 to 2021 using a smooth basis curve. The chart employs D3 v5’s `area` and `line` generators with `curveBasis` to create the shaded region and outline, while `scaleTime` and `scaleLinear` map the temporal and temperature axes. Data is loaded from a CSV via D3’s `csv` function, and the SVG rendering includes styled axes with tick marks and labels, with the area filled in blue and the line stroked in black.