I believe it's either microwaves or x-rays
I studied this last year
Answer:
b.
Explanation:
answer b is the only positive answer.
Various tissues if organs look under each other under a microscope.
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One of the signs that sleep is necessary is that all living creatures are harmed by lack of sleep. Correct answer: A Sleep serves important evolutionary functions for all animals, because sleep helps animals consolidate memories and learn. Animals sleep according to how much they eat – animals that eat food with a lower caloric density sleep less than others. However, lack of sleep and if the deprivation is long enough it can kill animals.
