Final answer:
The physiological night's rest for crew members must take place in a designated crew rest area.
Step-by-step explanation:
The physiological night's rest for crew members must take place in a designated crew rest area. Crew rest areas are specifically designed for crew members to take breaks and get the rest they need during long flights. These areas are equipped with sleeping berths or lie-flat seats to allow crew members to sleep and recharge before their next shift.