The answer is cerebellum. Organizing sensory input that guides movement is a function of the cerebellum. The cerebellum plays an important role in the motor control in the brain. It does not create movements, however, it contributes in terms of balance, timing and precision.
No, Your brain is still active ...even when you are sleeping
It can compromise oxygen and nutrient delivery to muscles which can cause cramps.
All of the above is the right answer. hoped this helped!!:-)