Understandable. that's the answer because Lucid means clearly or easy to understand.
The Air mass is a volume of air defined by the temperature and water vapor content. A front is the boundary between the two air masses.
High-pressure systems is characterized by relatively high surface pressures. Low pressure is associated in the overall ascent of air, cloud and stormy weather, strong winds, and relatively high humidity.
The Jet stream is the fast flowing air current that occurs in the atmosphere of Earth and the other planets. Global wind belt is formed by the Earth's spin and the unequal heating of the Earth's sunlight!
