Question

why we see a dreams​

Answer 1

The scientific study of dreams is called oneirology. Dreams mainly occur in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep.

Answer 2

we see a dream because of our love and affection towards a particular aim , hole day we keep on thinking about the same matter so at night our brain recap all those things which are mostly thought by us.