Question

why do we get dream is it a mystery or a scientific reason behind it​

Answer 1

Explanation:

Dreams usually occur during Rapid Eye Movement, or REM, sleep. This stage is thought to serve several functions: to rest a part of the brain (since some areas are active while others aren't) and to replenish brain chemicals, such as neurotransmitters.

Answer 2

Answer:

Actually when we sleep our brain reply all those information inside it , but when an individual is in sound sleep then he/she would not remember but due to lack of rest something we remember that remember part is what we called dream