Question

which of the following causes damage to the protective covering of nerve fibers in the brain and spinal cord? parkinsons disease dementia multiple sclerosis

Explanation:

Parkinson's disease affects dopamine - producing neurons. Dementia is a general term for cognitive decline. Multiple sclerosis (MS) is an autoimmune disease where the immune system attacks the myelin sheath (protective covering) of nerve fibers in the brain and spinal cord, leading to disrupted nerve signals.

Answer:

multiple sclerosis