[Solved] If the principal reason for a taxpayer's presence in an institution (e.g.,a nursing home)is the need and availability of medical care,the entire cost of lodging and meals is considered qualified medical expenditures. Naked Mole Rats: A species of hairless rodents known for their longevity, resistance to cancer, and ability to live in highly social, cooperative colonies underground. Social Insects: Insects that live in organized colonies and exhibit complex behaviors such as division of labor, cooperation, and the ability to solve problems as a collective. Pheromones: Substances created and emitted by an animal into the surroundings that influence the behavior or physical state of other members of its species. Chemical Signals: Molecules released by organisms to communicate with each other, influencing behavior, physiology, or development.