This bar chart displays the average daily usage in minutes for ten mobile apps, with each bar’s height corresponding to the usage value. Built with React and D3.js (v7), it renders as an SVG using `scaleBand` and `scaleLinear` for the axes, with `axisBottom` and `axisLeft` generating tick marks and gridlines. The chart loads its dataset from an embedded array in the HTML, while the React app uses a `ResizeObserver` to adapt the visualization’s dimensions. Interactive hover effects change bar color, and clicking a bar toggles its selection state, adjusting opacity and fill via D3’s join operation.