Final answer:
The final growth phase where hair naturally falls out is the telogen phase followed by the exogen phase. The hair growth cycle includes these phases, which lead to the shedding of hair and the subsequent growth of new hair.
Step-by-step explanation:
The final growth phase in which hair naturally falls out of the skin is called the telogen phase. This phase is a part of the hair growth cycle that also includes the anagen phase, the active growth period, and the catagen phase, a transitional period. After the active growth in the anagen phase, hair enters the catagen phase, which lasts about 2 to 3 weeks. Subsequently, the hair moves into the telogen phase, a resting period where the hair follicle is inactive. This phase lasts about 2 to 4 months. Following the telogen phase, the hair is released and shed during the exogen phase, which either happens concurrently with telogen or is considered a separate phase by some researchers. The shedding of hair makes way for a new hair follicle, and the cycle repeats with the next anagen phase.