Final answer:
In gymnastics, the attire for floor and vault exercises is a leotard only, providing freedom of movement and meeting competition standards.
Step-by-step explanation:
The attire for floor and vault exercises in gymnastics typically consists of a leotard. Gymnasts usually wear a leotard during these events for both practice and competition. The correct option for the attire worn during floor and vault gymnastics exercises is: 1) Leotard only. While some gymnasts may choose to wear shorts during practice, for official competitions, they wear only the leotard for maximum freedom of movement and aesthetics.