Answer:
The states of arousal describe the cycle of sleeping and alertness.
Explanation:
I would say it your views on it definitely matter and it doesn’t matter your race, gender, etc. it just matters how intelligent you are (I’m not sure if this helps? If it does tho mark brainliest?)
Answer:
chlorination
Explanation:
The use of chlorination to treat drinking water, which began in 1913, reduces the incidence of waterborne diseases.
Answer:
To keep healthcare workers safe from accidental injury from contaminated sharps.
Explanation: