Answer:
In this scenario, the police officer is dispatched to aid in locating an elderly person with Alzheimer's who has wandered away from a nursing home. This would fall under the basic policing task of "providing services to the public," as the officer is providing assistance to a member of the public in need. Specifically, the officer is helping to locate a vulnerable person who has gone missing and may be in danger, which is an important service that the police provide to the community.