This interactive scatterplot visualizes simulated Apple stock price data, showing individual data points distributed across a two-dimensional space based on their x and y coordinates. Users can click on any circle to select it, which re-renders the visualization with the selected point highlighted. The React app loads data from a CSV file and uses the D3 `select` API alongside `useContainerDimensions` and `ResizeObserver` to render the SVG responsively. The visualization relies on `renderCircles` to draw and update the circular marks.