What is the BB skill that comprises a jump from the beam while performing a straddle position?

The skill being described is a split jump with a full turn, which is performed on the balance beam. This maneuver involves jumping off the beam while executing a straddle position in the air. Specifically, in a split jump, the gymnast extends their legs into a split position, which creates a visually appealing form and demonstrates flexibility. The term “1/1” refers to the full turn executed in conjunction with the jump.

In contrast, the other options refer to different types of jumps or movements. A "jump 1/1" could imply a different kind of jump without the specific straddle position. The "tour jete" is a different leap that involves a distinct form and typically does not involve a full turn. Lastly, a "tuck jump" is characterized by bringing the knees toward the chest rather than extending them into a straddle position. Thus, the selected option accurately captures both the execution of the jump and the specific body position required for the skill in question.