Final answer:
Miranda's easy succumbing to Prospero's sleep spell indicates she is still under her father's control.
Step-by-step explanation:
The fact that Miranda so easily succumbs to Prospero's sleep spell most clearly indicates that she is still partially under her father's control. In this scene from Shakespeare's play The Tempest, Prospero uses his magic to make Miranda fall asleep, demonstrating his power over her. This suggests that Miranda is still dependent on her father and under his influence, even though she is a grown woman.
Learn more about Character analysis in The Tempest