This line chart visualizes daily mean temperature changes over time, with the x-axis representing days and the y-axis showing mean temperature in degrees. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` APIs to render an SVG path with red strokes. Data is loaded from a CSV file via `d3.csv`, and dates are parsed with `d3.timeParse`. Grid lines are drawn using tick sizes, and axis labels are added manually within the SVG.