This dashboard presents global mental health trends from 1990 to 2019 using four coordinated D3.js v7 SVG views. Users select a disorder from a dropdown to update a line chart of prevalence over time, a bar chart of the highest-prevalence countries, and a heatmap of prevalence by country and year, while a scatterplot compares anxiety versus bipolar prevalence across all countries. The code loads data from a CSV file and applies population-level aggregations to filter and render the visualizations.