Answer:
Front.
Step-by-step explanation:
- A front is a type of wall that id formed by the interaction of the two contrasting air masses of different nature and hence the cold air mass settles down due to the heavyweight or density and the warmer air mass goes upwards.
- Due to being lighter in weight and hence form what is known as the front when this front turns it turns in a cyclic manner in a clockwise direction and hence the formation of front cycle or the cyclone