<prompt> Eyebrows dont grow beyond certain length as they have a short -Anagen phaseTelogen phaseCatagen phaseExogen phase  <response>: Ans. is a i.e., Anagen phase o Hair grows in cycles of various phases. Anagen is growth phase. Catagen is involuting or regression phase. Telogen is resting phase. Exogen is shedding phase.o Normally 90 of the follicles are in anagen phase, 10-14 are in Telogen and 1-2 are in catagen.o The cycles duration is variable for the different parts of the body. For eyebrows, the cycle is finished in 3-4 months while for scalp it takes 3-4 years to finish.o This is the reason why eyebrows have much shorter length limit as compared to scalp hair. 