1) Marcia is learning to perform a back handspring for the first time at her gymnastics class. One beginning principle necessary for a safe and successful performance of this skill is to practice the movement:

At full speed immediately to feel how your body reacts.

In transition of other skills to simulate an advanced routine.

On an apparatus to help increase jumping height.

Upon watching an experienced performer’s proper technique.

D?

I agree.

To answer this question, let's look at each option and determine which one aligns with the beginning principle necessary for a safe and successful performance of a back handspring.

Option A: "At full speed immediately to feel how your body reacts."
Practicing a back handspring at full speed immediately without prior experience or proper technique can be dangerous and increase the risk of injury. This option does not align with the beginning principle of safety and success.

Option B: "In transition of other skills to simulate an advanced routine."
While practicing in transitions of other skills can be beneficial for developing routines, it may not provide the foundational experience and technique necessary for a safe and successful back handspring. This option is not the most appropriate for a beginner.

Option C: "On an apparatus to help increase jumping height."
Practicing on an apparatus specifically designed for increasing jumping height, such as a trampoline or springboard, may help with the execution of a back handspring. However, this option does not address the fundamental technique and body coordination required for a safe and successful performance of this skill.

Option D: "Upon watching an experienced performer’s proper technique."
This option aligns with the beginning principle necessary for a safe and successful performance of a back handspring. By watching an experienced performer's proper technique, Marcia can observe the correct form, body positioning, and execution of the skill. This will help her develop a better understanding of the movement, enabling her to practice with a focus on technique and safety.

Therefore, the correct answer is D) Upon watching an experienced performer’s proper technique.