You are correct, AQI stands for Air Quality Index (option b). The AQI is a measurement system used to assess and report the air quality in a specific location. It takes into account various pollutants such as ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide, and assigns a numerical value representing the air quality level. This index is helpful for individuals to understand the current air quality and take necessary precautions if needed.
