This chart visualizes the average body mass index (BMI) as a function of age using a bar chart rendered as SVG. It uses D3 v7 APIs such as `scaleLinear`, `scaleTime`, `axisBottom`, `axisLeft`, `bin`, `sum`, and the `.join('rect')` operation to group and display binned data. The visualization pulls data from a remote CSV file, computes BMI from weight and height fields, and formats axes with custom tick styling and labels for "Age" and "Average Body Mass Index".