Answer:
The words were borrowed into English along with the concepts they describe.
Step-by-step explanation:
Even though the terms pas de deux, arabesque and ballet are originally French, the English language has adopted their notions.
The term pas de deux refers to a dance for two people, usually of a man and a woman. The word arabesque is a position in which the body is supported on one leg while the other leg is extended horizontally backward. Finally, ballet involves an artistic form of dance performed to music, which makes use of exact and specific steps.