The statement that sleep is an universal biological need is true. Each organism on Earth has this need. The average adult needs about seven to eight hours of sleep per 24-hour day. The sleep cycle has five stages: stages 1-4 and the REM (rapid eye motion) sleep stage. Stages 1-4 are also known as NREM or non-REM sleep.
Explanation: Some ways it could become safer is if thier acceleration towrds the subject was softened to where there are not two objects of great acceleration heading towards each other.
