The stage is B. front forms.
Cyclogenesis is a term used to portray the increase or improvement of a typhoon, and is ordinarily used to depict the existence cycle of a mid-scope tornado.
It occurs in the following stages:
The principal phase of Cyclogenesis, the stationary stage, is named so because of the development of a stationary front. The surface breezes of the air mass combine, making the low weight framework.