A scatter plot uses D3.js v7 to visualize the relationship between temperature and humidity from a plant growth CSV dataset. The HTML page displays an SVG chart with green circular dots, each positioned by temperature on the x-axis and humidity on the y-axis, with axis labels and hover tooltips showing exact values. The visualization employs `d3.csv` to load data, `d3.scaleLinear` and `d3.extent` for axes, `d3.axisBottom` and `d3.axisLeft` for ticks, and CSS transitions for hover effects.