This bubble chart visualizes correlations between alcohol, wine quality, and residual sugar in the WineQT dataset, sourced from a GitHub-hosted CSV file. Each circle’s position encodes alcohol percentage (x-axis) and quality score (y-axis), while its radius reflects residual sugar content and its color maps pH levels using the `d3.scaleSequential` with `interpolateTurbo`. Interactive tooltips appear on hover via mouse events, and a gradient legend displays the pH color scale. The visualization uses D3 v7 with SVG rendering, `d3.axisBottom`/`d3.axisLeft` for axes, and animated opacity transitions on mouseover and mouseleave.