Seat belts
Control
Awareness
Like all types of dementia, Alzheimer's is caused by brain cell death. It is a neurodegenerative disease, which means there is progressive brain cell death that happens over a course of time. The total brain size shrinks with Alzheimer's - the tissue has progressively fewer nerve cells and connections.
The answer is A! The person who answered you before is wrong about the fact that diseases starting with the letter H cannot be treated though. For example, Hepatitis C is now considered curable, as scientists now have treatments for it that have been proven to remove the virus from the patient's bloodstream.
Answer:
they have webbed feet to help them swim