What happens when we dream

 

When we think of dreams its combined with imaginary and real world. When we sleep our brain start to backup our data from past hour,days,months creates illusion relastic and imaginary scens makes our brain busy whole night.But actually its not what happens in dreams theres another process being held what i think is that our brain is more vulnerable during sleep and dream our all stored data are being leacked or being stolen during dreaming.