There are dozens of good reviews of programmed cell death as a homeostatic process in normal development and physiology. You should be aware that apoptosis is but one of the various known forms of programmed cell death. May I suggest you study the current concepts in the PCD field reviewed in Galluzzi et al, Cell Death Differ. 25(3):486-541, 2018, and look for specific reviews in your current field of study in Pubmed. A large number of reviews focussed on the physiological roles of PCD were published in the 1990s and 2000s, but you are likely to find recent updates specific to your field.

Thank you very much for you answer dr.Fafael and Debasish

It a physiologica ald pathophysiological relevant process