premise: A Pet helps those who live alone.
hypothesis: Pet . Pets can give companionship to elderly adults who do not have adequate social interaction with other people , as well as to other people who are living alone . The most popular pets are likely dogs and cats but people also keep house rabbits , ferrets ; rodents such as gerbils , hamsters , chinchillas , fancy rats , and guinea pigs ; avian pets , such as canaries , parakeets , corvids , parrots , and chickens ; reptile pets , such as turtles , lizards and snakes ; aquatic pets , such as goldfish , tropical fish and frogs ; and arthropod pets , such as tarantulas and hermit crabs .