Which of the following is NOT one of the five categories of animals permitted on flights?

The correct answer highlights that "Celebrity animals" is not one of the recognized categories of animals permitted on flights. When it comes to air travel, animals are generally classified into specific categories, each with its own rules and requirements for boarding.

The established categories include service animals, which are specially trained to assist individuals with disabilities; emotional support animals, which provide comfort to their owners but do not have the same level of training as service animals; and pets, which can travel under different policies depending on the airline.

Unlike these categories, "celebrity animals" does not hold any official status in terms of airline policies, nor is it a recognized category under federal regulations. This category does not have standard guidelines or rights related to travel, which makes it the correct choice as the option that is not officially recognized as permissible for air travel.