A pupa is the life stage of some insects undergoing transformation between immature and mature stages. The pupal stage is found only in insects that undergo a complete metamorphosis, with four life stages: egg, larva, pupa, and imagoa, therefore, an empty pupae means the insect has emerged from the pupae by splitting the pupal case and leaving it empty
When you here the phone ring the sound we directly go to your ears and inform you that the phone is ringing and if you were thinking of something you will just as if you head it after two hours