Summarise from the given text, Why do people like pets?

1. Pets benefit their owners/guardians both physically and emotionally.
2. Talking a dog for a stroll helps both human and dog through physical exercise, inhaling fresh air and social interaction.
3. For people who live alone, aged people in nursery homes, children in hospitals etc who don't interact with other people, There is a class of medically approved therapy animals that are brought to visit to gain specific type of physical, social, cognitive, or emotional benefits