Which of the following is true regarding night rest?

The correct statement regarding night rest is that it may vary according to individual needs. This acknowledges that different people have different requirements for sleep and rest based on various factors such as age, lifestyle, health conditions, and personal preferences.

For example, while some individuals may function optimally with 7 to 9 hours of sleep at night, others might find they feel rested and alert after fewer hours or may require more rest. This variability is important because it emphasizes that there is no one-size-fits-all approach to rest and that individuals should understand and listen to their own bodies to determine what constitutes adequate rest for them.

The other options suggest more rigid or absolute criteria, which do not account for personal variability. Night rest can be affected by many factors, including lifestyle choices and external circumstances, indicating that it's essential for individuals to recognize their own unique needs when it comes to rest.