What occupations are considered as "arts" under the O visa immigration regulations?

A: A/ Arts includes any field of creative activity or endeavor such as, but not limited to, fine arts, visual arts, culinary arts, and performing arts. Aliens engaged in the field of arts include not only the principal creators and performers but other essential persons such as, but not limited to, directors, set designers, lighting designers, sound designers, choreographers, choreologists, conductors, orchestrators, coaches, arrangers, musical supervisors, costume designers, makeup artists, flight masters, stage technicians, and animal trainers.