Final answer:
The interactions of air masses can be compared to the interaction between opposing armies like battles. When air masses of different characteristics collide, they create turbulence, resulting in significant weather changes such as the formation of storms with lightning and hail.
Step-by-step explanation:
The interactions of air masses can be compared to the interaction between opposing armies like battles. When air masses of different characteristics collide, they create turbulence, resulting in thunderous roars. This collision leads to significant weather changes, such as the formation of storms with lightning and hail. Therefore, option a) They collide with a thunderous roar, creating turbulence, best describes the interactions of air masses.