Final answer:
AVIH (Animal Vivant in Hold) refers to live animals transported in the cargo hold of an aircraft, while SVAN (Service Animal) refers to animals trained to assist people with disabilities, traveling in the cabin.
Step-by-step explanation:
The terms AVIH and SVAN are acronyms that relate to the transportation of animals by air. AVIH stands for Animal Vivant in Hold, which refers to live animals transported in the aircraft's cargo hold. This could include pets larger than those allowed in the cabin, or animals that are being transported for zoos, research, or relocation purposes. On the other hand, SVAN stands for Service Animal, which usually refers to animals that have been trained to assist a person with a disability, such as guide dogs for the blind or service dogs for people with mobility issues. These animals typically travel in the cabin with their owner, as they provide a necessary service during the flight.