The brain is needed because if you didn't have a brain you wouldn't be able to do anything!
Your brain
Probabally 75%
Yes.
The brain is a 'physical' thing; which opperates based on chemical (physical) functions. A 'Spirit' is NON-physical'. A spirit does not need to 'eat, drink, etc'. A spirit is not dependent on physical things to exist. Therefore no legs, wings, or fins are needed to move about; no eyes are needed to see; no light is needed to see; no ears are needed to hear; no lungs are needed to breathe oxygen; and no brain is needed to 'think'.
Nothing physical is needed, but a good brain, education, and the ability to speak.
pen, paper, your brain
brain
no. only fatty acids.
to relax the brain
your Heart and Brain
Probably, a brain, some food, water, and shelter .
Your Pelvis bone, and your brain