This area chart visualizes phone screen time in hours across the seven days of the week, with a monotone-smoothed curve filling the space beneath the line in light steel blue. The SVG rendering uses D3 v7’s `d3.scalePoint` for the categorical day axis and `d3.scaleLinear` for the numeric hours axis, while `d3.area` with `d3.curveMonotoneX` generates the filled path. Axis labels are added via `d3.axisBottom` and `d3.axisLeft`, drawing from the hardcoded dataset of daily screen-time values.