This area chart visualizes the average number of goals or points scored by professional athletes at each age, based on data from the included SportsData.csv file. The visualization aggregates the raw data by age and plots the resulting mean values as a filled area, using a blue line to trace the trend. Built with D3 v7, the chart employs `d3.group` and `d3.mean` for data aggregation, `d3.scaleLinear` for axes, and the `d3.area` and `d3.line` generators to render the SVG path. A dark themed interface with light-colored axes labels and a semi-transparent fill provides a clear visual representation of performance across age groups.