This area chart visualizes BMI values for individuals, with each point color-coded and interactive. The chart uses D3.js v7 to fetch and parse CSV data from a GitHub gist, then renders an SVG area path and circles representing BMI readings. Users can hover over any data point to see a tooltip with the precise BMI value, which also changes the dot’s color and size. The visualization includes labeled axes for Individuals and BMI, with a light green fill for the area and responsive hover effects.