This interactive bar chart compares depression rates across the top 10 happiest countries for a selected year. A dropdown menu, populated from the data’s unique years, triggers a redraw. The chart uses d3.csv to load the dataset, d3.scaleBand and d3.scaleLinear for axes, and d3.axisBottom and d3.axisLeft for rendering. Bars are colored with a fixed teal fill, and country labels are rotated. The visualization updates dynamically by clearing the SVG and re-rendering for the chosen year.