What is the telogen phase of hair growth?

The telogen phase of hair growth is characterized as the stage where the hair is resting and essentially preparing to shed. During this phase, the follicles are at rest, and the old hairs stay in place while new hair begins to form beneath them. Eventually, as the hair matures, it will shed from the follicle, which correlates with the idea that this phase is when old hair naturally falls out. This process is a normal part of the hair growth cycle.

While there are phases where hair actively grows, such as the anagen phase, the telogen phase specifically marks the end of a hair cycle before new growth can occur. The other options refer to different aspects of hair growth or removal, but they don't accurately represent the telogen phase, which is predominantly about the resting stage and the eventual shedding of hair.