According to ADA standards, which of the following would be considered a service animal?

The Americans with Disabilities Act (ADA) specifies that only dogs are recognized as service animals. A service animal is defined as a dog that has been individually trained to perform tasks for a person with a disability. These tasks may include guiding individuals who are blind, alerting those who are deaf, pulling a wheelchair, or calming a person with a post-traumatic stress disorder during an anxiety attack, among others.

This definition does not extend to other types of animals, such as cats, birds, or hamsters, regardless of their training or their value as companions. Only trained dogs are afforded the full rights granted to service animals under ADA standards, which allows them to accompany their handlers in public accommodations where pets are generally not permitted. Therefore, the correct answer is that a dog is the only type of animal recognized as a service animal according to the ADA.