Question

one of the signs that sleep is necessary is that all living creatures__________.a. are harmed by lack of sleepb. can put off sleep for a timec. avoid sleep as much as possibled. can sleep longer than necessaryplease select the best answer from the choices provided

Explanation:

Sleep is a fundamental biological need. If all living creatures are harmed by lack of sleep, it indicates that sleep is necessary. Option B (can put off sleep for a time) doesn't imply necessity. Option C (avoid sleep as much as possible) is contrary to the idea of sleep being necessary. Option D (can sleep longer than necessary) also doesn't show the necessity of sleep. So, the best answer is A.

Answer:

A. are harmed by lack of sleep