This interactive bar chart displays salary statistics (median, average, lowest, and highest) for a selected country, with each metric rendered as a distinctly colored bar. A dropdown menu lets the user choose a country, triggering a re-render of the SVG visualization. The chart uses D3.js v7 to load data from a CSV, create scales, draw bars, and manage the tooltip and hover effects, while React handles the overall application structure. Bar colors come from D3’s `schemeCategory10`, and the tooltip appears on mouseover to show the numeric value.