Dora has been asleep for about an hour and a half minutes, her heart beats faster, her breathing is uneven and quick, and her eyes move back and forth with the eye lids shut. Dora has most likely entered what stage of sleep?
usually REM sleep happens about and hour and a half after you fall asleep. your heart rate and breathing quickens, and your eyes move rapidly. dreaming occurs during this stage due to increased brain activity.