D would be the answer because it’s more logical in a way than the others.
REM's are associated with dreaming. we spend the longest time in the REM stage. REM sleep is marked by a return to fast, irregular EEG patterns similar to those of stage 1. the brain is so active during REM it looks like the person may be awake
The answers i got are in blue, if one value of x has more than one value of y it is not a function, otherwise it is
Answer:
the answer would be migration