Which one of the following statements is true regarding voluntary and involuntary responses

If you are referring to our body's involuntary and voluntary responses then the answer should be that the involuntary processes often don't include the use of brain but rather just the spinal cord. It's like when you burn your hand and you instantly pull it closer to you, away from the stove, there was no brain function involved there, that was involuntary so as to protect you.

Organism, organ system, organs, tissue, cells