Hi,
9. What is the amount of fluoride concentration in water that's considered safe for the prevention of dental decay?
D. 1 part per million
I believe it's the last two. "makes the lungs able to fill more completely" and "helps the blood vessels dilate more easily" hope this helps, have an amazing day :)
The correct answer is B. Are definitions that are used in the legal system.
Answer:
it may improve the neural efficiency pls mark brainliest if correct Ty!
