How can Alzheimer's disease cause death?

Sorry to say yes, Alzheimer's is a disease that rob a person ability to walk, think, eat ect. ect. It comes in stages at first the person forgets little things, then as the stages mount up you start to notice that your love one gets lost ,forget where they park the car. They forget family members. In the last stage it rob the brain's ability to think therefore they don't eat. sorry.