a meteorologist analyzes data to develop weather forecasts. Which weather-based data would be most helpful for a meteorologist to track in order to most accurately predict changes in weather?

a number of recent thunderstorms and tornadoes sighted in an area
b density of air and humidity levels
c levels of precipitation and types of clouds
d temperature and moisture levels of moving air masses

The correct answer is d) temperature and moisture levels of moving air masses. Tracking the temperature and moisture levels of moving air masses is essential for meteorologists to accurately predict changes in weather. This information helps them understand the atmospheric conditions that can lead to the formation of precipitation, cloud formation, and severe weather events like thunderstorms and tornadoes. Air density and humidity levels (b) and levels of precipitation and types of clouds (c) are also important factors, but they are often influenced by the temperature and moisture levels of air masses.