Final answer:
A service dog is identified by its specific training and the tasks it performs for a person with a disability. They are different from emotional support animals and might wear a vest or harness.
Step-by-step explanation:
A service dog is easily identified by its specific training, as described in the provided information. A service animal is defined as a dog that is individually trained to do work or perform tasks for the benefit of a person with a disability. These tasks can include guiding individuals with visual impairments or alerting people with hearing impairments to sounds.
A service dog is different from an emotional support animal, as it receives extensive training to perform specific tasks related to a person's disability. Emotional support animals provide comfort and companionship but do not have the same level of training.
While most service dogs are identified by their specialized training, some might also wear a vest or harness indicating their role as a service dog.