This interactive bar chart visualizes survey responses across six categorical grades, from "sehr gut" to "ungenügend," with each bar's height encoding the count of responses. Built with React and D3 v5, the visualization uses SVG rendering and includes a tooltip that displays the category and value on hover. The chart employs `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis, with axis labels and a title. Hovering a bar triggers a transition animation that highlights the selected bar while dimming others, and overlays divergence values showing the difference between the hovered bar and each other bar's value.