Give an example of an organism that enters 'diapause' and why.

Diapause is an ecological strategy for the avoidance of harsh conditions that involves the cessation of development of a subadult life stage.

Bombyx mori (silk moth) is an insect that enters diapauses. It enters into diapause due to some adverse environmental conditions such as drought, reduce food availability, extreme temperature, which delays overall development. It diminishe all physical and metabolic activities and thus it is a type of survival mechanism exhibited by some organism at the time of adversity.