Final answer:
The task displaying emotion regulation is Sasha listening to music to feel more excited, demonstrating cognitive reappraisal.
Step-by-step explanation:
The task which is a display of emotion regulation is Sasha listening to hype music before soccer practice to feel more excited. Emotion regulation involves managing and responding to an emotional experience with a range of strategies. Sasha's choice to listen to music that amplifies her excitement is a purposeful way to influence her emotional state to be more conducive to her upcoming activity. It reflects the use of cognitive reappraisal, which is a strategy where one changes their emotional response by changing their thoughts about a certain stimulus or situation.