What unique characteristics make certain animal species well-suited for service to people?

Certain animal species, such as dogs and horses, possess unique characteristics that make them well-suited for service roles. These include high intelligence, strong social bonds with humans, and the ability to be trained for specific tasks. Additionally, their sensory capabilities, like a dog's keen sense of smell or a horse's responsiveness to human emotions, enhance their effectiveness in various service roles, from therapy to assistance for individuals with disabilities. Their adaptability and loyalty further strengthen the human-animal partnership essential for successful service.