Solution:

• Alzheimer’s disease is a degenerative disease of the brain.
• Alzheimer’s disease is a progressive neurodegenerative disorder that slowly destroys memory and thinking skills and, eventually, the ability to carry out the simplest tasks. It is the most common cause of dementia in older adults.
• The exact cause of Alzheimer’s disease is unknown, but it is thought to be caused by a combination of genetic and environmental factors.
• The disease is characterized by the buildup of amyloid plaques and tau tangles in the brain. These plaques and tangles damage and kill nerve cells, which leads to the symptoms of Alzheimer’s disease.