Phantom limb sensations and other experiences of amputees show that the brain can produce in the absence of normal sensory input

I believe the correct term to fill in the blank would be pain. Phantom limb sensations and other experiences of amputees show that the brain can produce pain in the absence of normal sensory input. Hope this answers the question. Have a nice day.

Because they are stupid and insensitive

The offspring will be blood type aa, bb, ab and oo or i