Final answer:
Going without sleep is harmful for creatures that need sleep, as it affects physical and mental health.
Step-by-step explanation:
Going without sleep is actively harmful for every creature that needs sleep. Sleep is a vital biological process that allows the body and brain to rest, repair, and rejuvenate. Without sufficient sleep, both physical and mental health can be compromised. For example, in humans, chronic sleep deprivation has been linked to a wide range of health issues, including impaired cognitive function, weakened immune system, increased risk of accidents, and even mood disorders like depression and anxiety.
Learn more about Effects of sleep deprivation