B. An Experiment, Mainly because a hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. A prediction is a <span>prophecy, And an observation is something that isn't full proven but opinioned. Therefore leaving B. An Experiment The only logical answer above. </span>
Answer:
It's a compound
Explanation:
A compound is two or more elements joined together. The fact that two oxygen particles and a carbon particle is joined together means it's a compound.
<span>An injury to Head/brain can hamper sleep -wake cycle.
other than that injuries to other regions can also hamper the sleep-wake cycle, because the pain could be unbearable resulting in loss of sleep.
So it is also dependent on kind and severity of the injury.</span>