This pie chart visualizes the distribution of house owners across six age groups, from under 20 to 60 and older, using data from a CSV file on housing. It categorizes each record's age into predefined ranges and counts occurrences per group. The chart renders as an SVG using `d3.pie` and `d3.arc`, with colors from `d3.scaleOrdinal` and `d3.schemeCategory10`. A separate HTML legend displays each age range alongside its count, built with D3 selections.