Which of the following is not helpful in keeping your balance?*Tightening core muscleFixing eyes on a spotFlapping your armsStaying focused

To determine which option is not helpful in keeping your balance, we should look at the function of each action:

1. Tightening core muscles: This action stabilizes your torso and provides support for balance. Core muscles play a crucial role in maintaining proper posture and balance.

2. Fixing eyes on a spot: This technique helps in maintaining focus and stability, as it allows the brain to process visual information effectively, aiding balance.

3. Flapping your arms: Unlike the other actions, flapping your arms is generally not a purposeful or effective way to maintain balance. While small adjustments of the arms can help with balance, excessive or random flapping is likely to be counterproductive.

4. Staying focused: Maintaining mental focus is essential for balance, as distractions can lead to loss of stability.

Based on this analysis, the correct answer is:

Flapping your arms is not helpful in keeping your balance.