Question

which statement describes polyphasic sleep?
polphasic sleep is a norm in which a person is the only one in bed or in the room.
polphasic sleep is a pattern of sleep involving sleep not only at night and at siesta time but also at various other times throughout the day.
polphasic sleep is an increase in rem sleep after a period of rem sleep deprivation.
polphasic sleep is a norm in which a person sleeps in the same room or same bed with another person.

Explanation:

To determine the correct statement about polyphasic sleep, we analyze each option:

• The first option describes a person sleeping alone, which is not related to polyphasic sleep (polyphasic is about sleep timing, not solitude).
• The second option: Polyphasic sleep is defined as a sleep pattern with multiple sleep episodes throughout the day (including night, siesta, and other times), which matches the definition.
• The third option refers to REM rebound (increase in REM after deprivation), not polyphasic sleep.
• The fourth option describes co - sleeping (sleeping with another person), not polyphasic sleep.

Answer:

B. Polyphasic sleep is a pattern of sleep involving sleep not only at night and at siesta time but also at various other times throughout the day.