This parallel coordinates chart displays survey data on happiness and membership in various organizations (e.g., religious, labor unions, sports) across multiple countries. Gray background lines provide context, while blue foreground lines highlight each country’s profile. Built with D3 v3, it uses `d3.svg.line`, `d3.svg.axis`, and `d3.svg.brush` for interactive filtering. Users can drag axes to reorder dimensions or brush along an axis to highlight matching lines. SVG rendering with drag-and-drop animations updates the paths smoothly. Data is loaded from an external CSV file.