Question

one of the signs that sleep is necessary is that all living creatures _______
a. are harmed by lack of sleep
b. can put off sleep for a time
c. avoid sleep as much as possible
d. can sleep longer than necessary

please select the best answer from the choices provided

a
b
c
d

Explanation:

Analyze the question stem and the concept of sleep necessity

The question asks for a sign indicating that sleep is biologically necessary for all living creatures. A biological necessity means that a lack of it leads to negative physiological consequences, impairment, or harm.

Evaluate the given options

• A. are harmed by lack of sleep: This directly supports the idea that sleep is necessary for survival and healthy functioning. If an organism is harmed when deprived of sleep, it proves sleep is a vital requirement.
• B. can put off sleep for a time: While true for some species, being able to delay sleep temporarily does not demonstrate that sleep is ultimately necessary.
• C. avoid sleep as much as possible: This is factually incorrect; organisms do not actively avoid sleep, and it does not show necessity.
• D. can sleep longer than necessary: Sleeping more than needed does not serve as evidence that sleep itself is a fundamental biological requirement.

Select the best option

Option A is the only choice that directly demonstrates the biological necessity of sleep.

Answer:

• (A) are harmed by lack of sleep (Correct answer)
• (B) can put off sleep for a time
• (C) avoid sleep as much as possible
• (D) can sleep longer than necessary