The animal often referred to as "man's best friend" is the dog. This phrase highlights the deep bond between humans and dogs, a relationship that dates back thousands of years. Dogs were among the first domesticated animals, originally bred for various purposes, including hunting, guarding, and companionship. Today, they serve diverse roles, from family pets to service animals that assist individuals with disabilities, law enforcement, and search-and-rescue operations. Known for their loyalty, companionship, and ability to understand human emotions, dogs can provide psychological benefits to their owners, enhancing mental well-being and providing unconditional love and support.